It's supposedly a trojan that tries to do malicious things by the means of security holes in Adobe's Acrobat reader.
Symantec says Update your scan strings and run a full scan.
HERE you'll find a (huge) list of points in case you'd like to remove it manually:
But I would just give
Malwarebytes a try (according to their website it's able to deal with bloodhound.
-DG