Adobe is currently investigating a new security hole in Reader and Acrobat. Cybercriminals are currently spamming emails with prepared documents which lead to an infection of the computer with malware.
Avira users are protected from the threat. Our antimalware solutions detect the malicious PDF files generically without updated detections as HTML/Malicious.PDF.Gen. The downloaded malware gets detected as TR/Drop.Agent.DT with VDF version 7.10.01.243.
Anyhow users are best advised to not open PDF files they receive unexpectedly until Adobe provides Updates for Reader and Acrobat.