Malicious PDF — malware analysis report

Heuristics 5

• PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
  PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
  PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL https://cctraff.ru/strik?keyword=precalculus+questions+and+answers+pdf In PDF document text

  • http://files.heidigibbonsphotography.com/uploads/1/3/1/4/131437702/6f1ab94bf549e.pdfIn PDF document text
  • http://dosenez.weareallrare.com/uploads/1/3/0/7/130740000/vagofodipux_venilum.pdfIn PDF document text
  • http://files.supportiveconceptionssurrogacy.com/uploads/1/3/1/3/131383242/vonoturubevapavimop.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://uploads.strikinglycdn.com/files/53346ce1-e7ad-4a33-9fb6-f5846cd4fe47/gufixu.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/c99e5ae9-93f6-49a4-87a7-55fc51835042/35814574387.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/7d2f6ddf-ba2a-40f3-8926-aa2d0d6b6603/77753442154.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1ee3ec82-d54f-418c-90b0-bb63cd1bac65/85549503037.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/52878514687.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/21928447602.pdfIn PDF document text
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://scripts.sil.org/OFLIn PDF document text

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