Prompt

Our analysts managed to get hold of a document that we believe has a flag on it. Can you recover it?

Questions

What is the name of the program that exported this PDF file?

Use a metadata viewer, such as Metadata2go, and look for the “creator_tool” field.

What PDF version is this file?

Use a metadata viewer, such as Metadata2go, and look for the “pdf_version” field.

What software was used to redact the file and insert a watermark?

Use a PDF editor to delete the black box covering the watermark on the center of the page.

What is the flag?

You can either remove the black boxes next to tlsSocket.getFlag() using a PDF editor or you can highlight the entire area around the black box as the text behind the box will still get added to the clipboard.

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