The most recent one of these is a string of attacks against an Adobe Reader vulnerability from 2010. The vulnerability, which is more than two years old, is a flaw in Reader and Acrobat that can be exploited remotely. Researchers at Symantec have found that there are still attacks ongoing against the bug. The attacks involve some highly obfuscated JavaScript, as such attacks are wont to do. The end result is that once the resultant shell code is on the victim s machine, it attempts to download a malicious executable from a remote server.
Source: https://threatpost.com/waves-attacks-target-adobe-reader-bug-2010-022212/76243/