Buffer overflow in the ActiveX component (pdf.ocx) for Adobe Acrobat 5.0.5 and Acrobat Reader, and possibly other versions, allows remote attackers to execute arbitrary code via a URI for a PDF file with a null terminator (%00) followed by a long string.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16998
http://www.securityfocus.com/bid/10947
http://www.idefense.com/application/poi/display?id=126&type=vulnerabilities