Latvia is definitely becoming a problem when it comes to black hat hosting. The 159.148.117.0/24 range (159.148.117.0 - 159.148.117.255) is another malicious block, forming part of AS2588 belonging to Latnet (similar to microlines.lv). At a rough calculation, roughly half the IP address ranges I am currently blocking are based in Latvia.
This bunch of domains is a mix of fake pharma sites, browser exploits, illegal downloads and possibly some hijacked domains. In any case, there is nothing of use here and either blocking the entire IP range, or the list below is probably a good idea.
There's a more detailed file with MyWOT ratings and IP addresses to download here.
Bitssit.com
Solid-pay-gate.com
Bombastats.com
1001meds.info
101doctors.info
101health.info
11doctors.info
333tabs.info
5meds.info
911drugs.info
99pharmacy.info
99pills.info
Abouttabs.info
Actualdrugs.info
Actualtabs.info
Addhealth.info
Addpills.info
Advancedsoft.in
Allpills.info
Anyhealth.info
Anymeds.info
Anytabs.info
Atlanticdrugs.info
Atlantictabs.info
Bestwesthost.info
Bluedoctor.info
Buycheapnow3.info
Buyfdatabs.info
Buygeneric1.info
Buyld.info
Buyonline5.info
Buytramadol5.info
Buytramadolf.info
Buytramadolk.info
Buytramadolp.info
Buytramadolt.info
Buytramadoly.info
Buyxanax1.info
Buyxanaxk.info
Cheap2tramadol.info
Cheaponline2.info
Cheaprt.info
Cheaptramadolh.info
Cheaptramadoli.info
Cheaptramadolss.info
Cheaptramadolw.info
Cheaptramadolz.info
Cheapxanaxz.info
Doctor01.info
Doctorarea.info
Doctordaily.info
Doctorgiant.info
Doctorjones.info
Dogoal.in
Drugs01.info
Drugs12.info
Drugsapple.info
Drugsbasket.info
Drugsblue.info
Drugscenter.info
Drugsclub.info
Drugscompany.info
Drugsdaily.info
Drugsfast.info
Drugsgood.info
Drugslife.info
Drugsreview.info
Drugstoree.info
Fasttabs.info
Fdapillsonline.info
Fulink.in
Fustat.in
Generictramadolb.info
Generictramadolc.info
Generictramadoln.info
Generictramadolr.info
Generictramadolv.info
Genericxanaxn.info
Getonlinehealth.info
Getonlinemeds.info
Haycorn.info
Health911.info
Healthbasket.info
Healthblue.info
Healthgreat.info
Healthlabel.info
Kinghealth.info
Kingpills.info
Knownmeds.info
Knowntabs.info
Labeldrugs.info
Labelhealth.info
Meds01.info
Meds333.info
Meds4him.info
Medsapple.info
Medsarea.info
Medsdaily.info
Medsexpress.info
Medsguard.info
Medshealth.info
Medslife.info
Medslocate.info
Medssearch.info
Mmlist.in
Mmsoft.in
Moderndrugs.info
Modernpills.info
Mxstat.in
Needsdoctor.info
Olstat.in
Online01.info
Onlinecasinosbestusa.info
Onlineow.info
Ordercheapnow6.info
Orderoj.info
Orderonline4.info
Ordertramadold.info
Ordertramadole.info
Ordertramadolj.info
Ordertramadolo.info
Ordertramadolx.info
Orderxanaxx.info
Owndoctor.info
Pacificdoctor.info
Pills007.info
Pills01.info
Pills4him.info
Pills4men.info
Pillsaccept.info
Pillsarea.info
Pillsblue.info
Pillscontrol.info
Pillsdaily.info
Pillsfast.info
Pillsgood.info
Pillslabel.info
Pillslife.info
Pillslocate.info
Pillsoffice.info
Pillsreview.info
Pillssearch.info
Pillstoday.info
Pillsworld.info
Realtabs.info
Rx999.info
Safedoctor.info
Searchtabs.info
Sermyagino.info
Ssmode.in
Ssnews.in
Tabs01.info
Tabs4him.info
Tabs5.info
Tabsaccept.info
Tabsapple.info
Tabsarea.info
Tabscenter.info
Tabsclub.info
Tabscompany.info
Tabscontrol.info
Tabsdaily.info
Tabsexpress.info
Tabsguard.info
Tabsguide.info
Tabslife.info
Tabsoffice.info
Tabspills.info
Tabsreview.info
Tabssearch.info
Tabsworld.info
Todaypills.info
Todaytabs.info
Tramadolonline7.info
Tramadolonlinea.info
Tramadolonlineg.info
Tramadolonlinel.info
Tramadolonlineq.info
Tramadolonlineu.info
Tramadoltramadol1.info
Tramadoltramadol10.info
Tramadoltramadol2.info
Tramadoltramadol3.info
Tramadoltramadol4.info
Tramadoltramadol5.info
Tramadoltramadol6.info
Tramadoltramadol7.info
Tramadoltramadol8.info
Tramadoltramadol9.info
Uiplus.in
Usaapharm.info
Usausaonlinecasinossuper.info
Xanaxonlinee.info
Xanaxonlinel.info
Pupseg.net
Pupseg.org
Pixelstatservice.com
Mybesttubeporn.com
Rowfirst.com
Java-9update.com
Update-00server.com
Hqll.ru
Xacz.ru
Aloa.asia
Vniz.asia
Bbls.ru
Vaseagruzitkorm.com
Vaseajretikru.com
Ewacx.com
Yacver.com
Security-defencing.com
Mypctech.net
1200kb.net
Banfieldsbest.com
Btp-tags.com
Doit-4-u.com
In-ta.net
Media-share.org
Mwcdirect.com
Pixel-pie.com
Planetsoldat.com
Sainser.com
Wnizip.com
Thebestporn.in
Cormoupo.info
Zombie-world.org
Alterparadigma.net
Brickplayer.ru
Chilauter.ru
Compromendes.com
Moretds.org
Danjg.com
Aftui.in
Ammew.info
Armrm.in
Aspow.info
Clasd.in
Coerw.info
Demim.in
Diasw.info
Diaui.in
Expew.info
Eynew.info
Gatui.in
Harui.in
Highw.info
Homow.in
Jenyx.in
Jusui.in
Katre.in
Lisni.in
Manui.in
Marsw.in
Marui.in
Micre.in
Neigw.info
Ningl.in
Nitan.in
Nvenc.in
Nvene.in
Nvild.in
Nvill.in
Pockw.info
Praaw.info
Pulpm.in
Racew.info
Recei.in
Recky.in
Recto.in
Regaw.info
Rendm.in
Sepsd.in
Slovw.in
Socyx.in
Stpsd.in
Synre.in
Thiui.in
Torsw.in
Uianh.in
Volnv.in
Yxiac.in
California-ns.com
UPDATE 2014-06-25: It's been a long time since I wrote this, and it looks like the block was cleaned up some time ago and now contains some Latvian government sites.