PDF Viewer

53 downloads

Uploaded by: Ketchapp
Version: 19 (build 19)

PDF Viewer versions

19 (build 19)
53 downloads
Size: 1.8 MiB
Publish Date: 2024-09-12
Category: Tools
Package: app.grapheneos.pdfviewer
Minimum OS: Android 8.0
SHA1: dc70ebf31f67b49973ed7a70a3294d2670f246c0
Description: The app doesn't require any permissions. The PDF stream is fed into the sandboxed WebView without giving it access to content or files. Content-Security-Policy is used to enforce that the JavaScript and styling properties within the WebView are entirely static content from the apk assets. It reuses the hardened Chromium rendering stack while only exposing a tiny subset of the attack surface compared to actual web content. The PDF rendering code itself is memory safe with dynamic code evaluation disabled, and even if an attacker did gain code execution by exploiting the underlying web rendering engine, they're within the Chromium renderer sandbox with no access to the network (unlike a browser), files, or other content.

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