PDF Viewer

90 downloads

Uploaded by

Psychopath

Version

31 (build 31)  4 version(s)

PDF Viewer versions

31 (build 31)

90 downloads

30 (build 30)

79 downloads

29 (build 29)

69 downloads

28 (build 28)

70 downloads

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Size

3.5 MiB

Publish Date

2025-09-01

Category

Tools

Package

app.grapheneos.pdfviewer

Minimum OS

Android 8.0

SHA1

052d5d88f2bd11a7d2850eef1fd0f7830aaba07a

Description

Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions. The PDF stream is fed into the sandboxed WebView without giving it access to the network, files, content providers or any other data. Content-Security-Policy is used to enforce that the JavaScript and styling properties within the WebView are entirely static content from the APK assets along with blocking custom fonts since pdf.js handles rendering those itself. 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 less access than it would have within the browser.