I just tried to download adobe reader from http://get.adobe.com/es/reader/
It blocked my download, it said it was a trojan (dont remember the name). Secons after, it found another .exe with the same trojan in the temp folder and moved it to the virus chest. I sended the file to avast and deleted it.
It seems like a false possitive to me because it was downloaded from Adobe official site, but may be u want to investigate it.
Asyn
2