QuickBooks "Important - Payment Overdue" spam has a malicious PDF attachment

This fake QuickBooks Invoice spam comes with a malicious payload:

From:     QuickBooks Invoice [auto-invoice@quickbooks.com]
Date:     29 July 2014 23:08
Subject:     Important - Payment Overdue

Please find attached your invoices for the past months. Remit the payment by 07/30/2014 as outlines under our "Payment Terms" agreement.

Thank you for your business,

Sincerely,
Josephine Shirley

This e-mail has been sent from an automated system.  PLEASE DO NOT REPLY.

The information contained in this message may be privileged, confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify your representative immediately and delete this message from your computer. Thank you.

The attached file (in this case invoice_7564675_07292014.pdf) contains an exploit with a VirusTotal detection rate of 7/53. I haven't had a chance to analyse the exploit myself yet.