Date: Tue, 17 Sep 2013 20:32:04 +0530 [11:02:04 EDT]Attached to the email is a file called ADP_831290760091.zip which in turn contains ADP_Reference_09172013.exe which has a VirusTotal detection rate of 9/48.
From: ADP ClientServices
Subject: ADP - Reference #831290760091
Priority: High Priority 1 (High)
We were unable to process your recent transaction. Please verify your details and try again.
If the problem persists, contact us to complete your order.
Transaction details are shown in the attached file.
This e-mail has been sent from an automated system.
PLEASE DO NOT REPLY.
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Automated analysis    shows a connection attempt to awcoomer.com on 188.8.131.52 (UK Dedicated Servers Ltd, UK). I don't have any evidence of further infections on this server, it does host 30+ legitimate UK sites if that helps..