Malware spam: "Attached is the tax invoice of your company. Please do the payment in an urgent manner." leads to Locky

This fake financial spam leads to Locky ransomware:

Subject:     Tax invoice
From:     Kris Allison (Allison.5326@resorts.com.mx)
Date:     Tuesday, 13 September 2016, 11:22

Dear Client,

Attached is the tax invoice of your company. Please do the payment in an urgent manner.


Best regards,
Kris Allison

The name of the sender will vary. Attached is a randomly-named ZIP file containing a malicious .wsf with a name beginning with "tax_invoice_scan PDF". According to my trusted source (thank you!) the various scripts download a component from one of the following locations:

adzebur.com/dsd7gk  [37.200.70.6] (Selectel Ltd, Russia)
duelrid.com/b9m1t [37.200.70.6] (Selectel Ltd, Russia)
            [78.212.131.10] (21 Century Telecom Ltd, Russia)
            [31.210.120.153] (Sayfa Net, Turkey)
madaen.net/e3ib4f   [143.95.252.28] (Athenix Inc, US)
morningaamu.com/6wdivzv [192.3.7.44] (Virtual Machine Solutions LLC, US)
            [23.95.106.223] (New Wave Netconnect, US)
            [23.249.164.116] (Net3 Inc, US)
smilehm.com/f72gngb [not resolving]

The payload then phones home to:

91.214.71.101/data/info.php (ArtPlanet LLC, Russia)
51.255.105.2/data/info.php (New Wind Stanislav, Montenegro / OVH, France)
185.154.15.150/data/info.php (Denis Dunaevskiy, Ukraine / Zomro, Netherlands)
46.173.214.95/data/info.php (Garant-Park-Internet Ltd, Russia)
95.85.29.208/data/info.php (Digital Ocean, Netherlands)
yofkhfskdyiqo.biz/data/info.php   [69.195.129.70] (Joes Datacenter, US)
khpnqbggoexgbyypy.pw/data/info.php   [217.187.13.71] (O2 / Telefonica, Germany)
nbrqrwyjbwcludpjj.click/data/info.php
atjefykfsk.su/data/info.php
dsvuclpoxbqmkdk.xyz/data/info.php
bidmvvhwy.pl/data/info.php
gfhstncbxtjeyhvad.work/data/info.php
iyvrkkrpk.biz/data/info.php
awqgqseghmwgulmyl.su/data/info.php
hioknruwp.ru/data/info.php
cucwonardfib.xyz/data/info.php
vwcwpoksnfk.su/data/info.php

Recommended blocklist:
37.200.70.6
91.214.71.101
51.255.105.0/28
185.154.15.150
46.173.214.95
95.85.29.208
217.187.13.71

UPDATE: further analysis gives these other IPs to block..

78.212.131.10
31.210.120.153
192.3.7.44
23.95.106.128/25
23.249.164.116