Malicious PDF — malware analysis report

Heuristics 8

• 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.
• Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
  Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
• Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
  Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
• QR-code redirect lure medium SE_QR_LURE
  Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• 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://ttraff.ru/wix?keyword=apk+editor+pro+apk+mirror In PDF document text

  • http://files.mcfieldassociates.com/uploads/1/3/1/0/131070089/nejotevepowelo.pdfIn PDF document text
  • http://files.connectioncounseling.org/uploads/1/3/0/7/130739764/kujigotop.pdfIn PDF document text
  • http://files.fritzcornmaze.com/uploads/1/3/2/6/132695339/486180.pdfIn PDF document text
  • http://gadurofis.kelliannmorgan.com/uploads/1/3/2/7/132741508/f2b19.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://24672b80-0001-4f01-9ec2-f624e028a7ec.filesusr.com/ugd/81cd61_d0a0effe23d348c0845c9faf2d971dbb.pdf?index=trueIn PDF document text
  • https://23ba9740-8e9f-4f9f-81be-2a77c080c07f.filesusr.com/ugd/3ce946_15b99823ff38459d8b7037d7ce6b7a2c.pdf?index=trueIn PDF document text
  • https://53c27fc9-8166-4362-8b28-099f50a06c86.filesusr.com/ugd/b7306e_271eef9bee194c43a718af0f692cb328.pdf?index=trueIn PDF document text
  • https://660b6a4b-3a9e-46e8-a845-a11787361aa4.filesusr.com/ugd/ebcc4b_5f1e164cf41544cca272563dd3e96292.pdf?index=trueIn PDF document text
  • https://d24287e2-ed7d-4a50-a88b-8133ca194aca.filesusr.com/ugd/db1da1_07464e2a49054dceb0a2658947e4cc66.pdf?index=trueIn PDF document text
  • https://5517a979-eba3-4b09-809f-85bdabecef01.filesusr.com/ugd/ae059d_d817e43b5d4246798bf9b9944696a553.pdf?index=trueIn PDF document text
  • https://2a0ad391-eef0-4cb7-bb93-70a1e258947a.filesusr.com/ugd/bcc0e4_edd42aed239641cdb7dd519d2a9ef272.pdf?index=trueIn PDF document text
  • https://20fd24fc-b587-4850-9577-928022d307d4.filesusr.com/ugd/234f58_dc790313579a4e259f0a9f669c310492.pdf?index=trueIn PDF document text
  • https://c1fa65c4-6c0a-49fe-a492-1970e816d980.filesusr.com/ugd/3225da_6a8cef1f49c947479628e514cdfb1553.pdf?index=trueIn PDF document text
  • https://76db6f62-ea1e-4ecf-979c-9dd1912c0799.filesusr.com/ugd/1e533a_6f5910d9803044e7b11ebe10b2a2c1a5.pdf?index=trueIn PDF document text
  • https://0cbea72f-d568-4940-b976-027fa3247da7.filesusr.com/ugd/934fc3_d572e293027f4f3eb41ec8c497d216b3.pdf?index=trueIn 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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