Malware Now Being Pushed in ".arj" Files

Most file compression formats are ripe for exploitation these days. We've seen our first .arj files today:

Thank you for using our services!
Your order #37311131537 will be shipped on 05-09-2014.

Date: September 02, 2014. 03:09pm
Price: £191.50
Payment method: Wire transfer
Transaction number: 0466142997148E

Please find the detailed information on your purchase in the attached file (sale_2014-09-02_14-20-08_37311131537.arj)

Best regards,
Sales Department
Evelina Example
+07775 xxx xxx

The payload is a Windows™ executable as one might expect.