Invisible OAuth redirect link

PDF_OAUTH_REDIRECT_LINK_LURE

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high PDF_OAUTH_REDIRECT_LINK_LURE

What it means

PDF uses invisible link annotations that point to an OAuth authorization URL with a redirector chain.

Why it fires

OAuth authorization URLs with client_id, response_type=code, and redirect_uri parameters are legitimate in web apps, but are unusual as repeated invisible PDF link targets. When the redirect_uri leads through safelink/photo-link redirect infrastructure, the shape matches credential-phishing PDFs that hide the actual collection site behind trusted-looking redirects.

Other PDF heuristics

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