Dangerzone
dangerzone.rocks
external-link
Take potentially dangerous PDFs, office documents, or images and convert them to a safe PDF.

Literally one of the worst formats I deal with daily, from a security standpoint are PDFs. Very useful and predictable for the end user; yes, but very dangerous for the capabilities it allows.

Dangerzone works like this: You give it a document that you don’t know if you can trust (for example, an email attachment). Inside of a sandbox, Dangerzone converts the document to a PDF (if it isn’t already one), and then converts the PDF into raw pixel data: a huge list of RGB color values for each page. Then, in a separate sandbox, Dangerzone takes this pixel data and converts it back into a PDF.

This is looking like it’ll be a valuable tool I’ll use frequently.

fearout
link
fedilink
15
edit-2
1Y

So it basically rasterizes it? I wonder how it affects file size

PenguinCoder
creator
link
fedilink
11Y

Yeah, definitely increases the size and removes some functionality that others may rely on. But for presentation of content which is what a PDF SHOULD BE, then it has typically worked fine. I’ve been using pandoc and some home grown scripts to do this sort of thing for a while.

Oh, I think you already know.

No mention of OCR? Copy-pasting links or data will be a joy…

There is an optional Ocr pass, from what I understand

I don’t know the pdf format very well, is it possible to just drop a few commands that make it vulnerable?

@Blackbird@infosec.pub
link
fedilink
English
51Y

Cool concept.

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