The PDF library in Microsoft Edge; Windows 8.1; Windows Server 2012 and R2; Windows RT 8.1; and Windows 10, 1511, and 1607 allows remote attackers to execute arbitrary code via a crafted PDF file, aka "Microsoft PDF Remote Code Execution Vulnerability."
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0023