Portable Document Spear

| Defense Layer | Implementation | | :--- | :--- | | | Force all PDFs to open in a cloud sandbox (e.g., VMRay, Joe Sandbox) before delivery. | | Disable JavaScript | In Group Policy: Set bEnableJavaScript = false in Adobe Reader DC. | | Application Guard | Microsoft Defender Application Guard opens Office/PDF files in an isolated Hyper-V container. | | Link Isolation | Use a secure web gateway (Zscaler, Netskope) that rewrites all PDF links in real-time. |