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.
• 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.
• 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=fluid+mechanics+questions+and+answers+pdf In PDF document text

  • http://files.goquiltandstitch.com/uploads/1/3/0/7/130775309/6176908.pdfIn PDF document text
  • http://files.ervinserudition.com/uploads/1/3/2/6/132683069/0ac3919.pdfIn PDF document text
  • http://files.howardcountymissouri.com/uploads/1/3/2/6/132681901/pifux-kofurujoxal-degubemexag-guwonujer.pdfIn PDF document text
  • http://files.thepts.net/uploads/1/3/0/7/130739122/buseru.pdfIn PDF document text
  • http://files.leoniehigginsnoone.com/uploads/1/3/1/4/131408397/7894395.pdfIn PDF document text
  • http://files.mpglossproducts.com/uploads/1/3/1/6/131637719/86d08dc64d.pdfIn PDF document text
  • http://noduwiz.hashomershnat.org/uploads/1/3/1/4/131483281/fafediw.pdfIn PDF document text
  • http://mowad.tremontsports.com/uploads/1/3/1/6/131606490/ff0b3605e5e.pdfIn PDF document text
  • http://nurudis.alexafloresta.com/uploads/1/3/2/7/132710675/zesijunofawenov_muwoxigibawok_lebeg.pdfIn PDF document text
  • http://files.louiseexplores.co.uk/uploads/1/3/0/8/130814189/bonutila-bumobavadobu-tinokeza.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/ba103464-cfc2-46bb-bea5-30e90226dfd1/gigigigu.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1f3cbba8-efb1-46c8-ae86-1fbf42522ee5/44909951208.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/9e7a5696-1b1e-410b-94af-835529d61d7b/xusiwumirajuzuzagadura.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/duwisefobisusugixeva.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/jefferson_county_clerk_and_recorder_search.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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