The attachment is a PDF that had a short message with a link that was a shortened URL. Red Flag. The URL was https: // smarturl . im / 4An1r. You can use
http://www.checkshorturl.com/ to see where it is pointing. In this case it was pointing to https : // baicaio . bid / cccc / files / index.php. If you look at the whois for the root domain you will see it was created just a few days ago. Red Flag. There is a link from the checkshorturl.com site that allows you to see if the domain was reported. When I first got the email it was only showing on Sucuri. Now it shows on Google and McAfee (SiteAdvisor). Red Flag. So yeah I sent him an email about it too but like everyone I didn't hear back. Opening in a VM that isn't linked to your network is a good idea but isn't fool proof.
http://venom.crowdstrike.com/ Treat it like the plague and wipe it off the face of the earth. Unless you are like me and Mark who like to test the limits at time ;)