sendgrid.me / amazonaws.com spam

This spam is unusual in that it comes through an apparently genuine commercial email provider (sendgrid.me) and leads to malware hosted on Amazon's cloud service, amazonaws.com. There is no body text in the spam, just an image designed to look like a downloadable document.

from:     [victim] via sendgrid.me date:     8 July 2013 19:08subject:     Urgent 6:08 PM 244999Signed by:     sendgrid.me