Trojan.Pidief is a detection for a family of Trojans that exploit one or more Adobe Reader and Acrobat Vulnerabilities in order to drop or download additional malware on to the compromised computer.

Initial Daily Certified version of virus definitions for Norton security products was released on December 17, 2009 revision 005. It should be noted that users with the older versions of Norton Internet Security are limited to Daily LiveUpdate definitions. For more information, go to the page where the are described virus definitions available for Norton products.

Trojan.Pidief Threat Assessment

Component	Severity
Wild Level	Medium
Number of Infections	50 - 999
Number of Sites	0 - 2
Geographical Distribution	Medium
Threat Containment	Easy
Removal	Easy
Damage Level	Medium
Distribution Level	Low

According to the Symantec Threat Severity Assessment, overall risk of Trojan.Pidief is now categorized as «Very Low» — poses little threat to users; rarely even makes headlines; no reports in the wild. Read more about Threat Severity Assessment.

More information about Trojan.Pidief, you can find on the official site of Symantec Corporation, where in addition to useful information you can find technical details and removal instructions: www.symantec.com

It is also recommended to read the article Network security threats, where you can find a brief description and explanation of the most dangerous security threats plus a few simple tips on how to protect your personal computer from them.