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.
• Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
  Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
• 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://ggtraff.ru/123?keyword=binomial+distribution+chart+12 In PDF document text

  • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8bee17d63a7.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4389606/normal_5f8f4ebf747ff.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4389576/normal_5f8dea4237a36.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4422134/normal_5f9f329b4ba55.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8773fd33922.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4380858/normal_5f95bef04def8.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4376354/normal_5f92276c97b49.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8da7bedfb1d.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/90adda0c-ed0a-4548-af8c-42ff32c5fc70/vending_apk_android.pdfIn PDF document text
  • https://s3.amazonaws.com/suxiweke/cch_chuyn_i_file_sang_nh.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0504/0947/2188/files/zowamusomubekoxozikariwo.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/95033811-af55-4554-a81d-631b77eb31e5/81860643635.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0506/9278/4305/files/ap_language_and_composition_syllabus_2021.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0506/0309/8288/files/industrial_revolution_quiz_answer_key.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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