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 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.
• Urgency / deadline lure low SE_URGENCY_LURE
  Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
• 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=acute+ischemic+stroke+guidelines+2020+pdf In PDF document text

  • http://files.oconnart.com/uploads/1/3/1/3/131380759/9bbf9d23049e6.pdfIn PDF document text
  • http://files.suzannakrivulskaya.com/uploads/1/3/1/3/131381946/4009196.pdfIn PDF document text
  • http://files.ardennenvakantiehuizen.be/uploads/1/3/1/1/131163902/vazasixomuv.pdfIn PDF document text
  • https://site-1043770.mozfiles.com/files/1043770/57745788991.pdfIn PDF document text
  • https://site-1042665.mozfiles.com/files/1042665/49942327948.pdfIn PDF document text
  • https://site-1038581.mozfiles.com/files/1038581/tixonit.pdfIn PDF document text
  • https://site-1036950.mozfiles.com/files/1036950/xererafowobizexazijuduzof.pdfIn PDF document text
  • https://site-1038614.mozfiles.com/files/1038614/84594441780.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/1d0d4cd4-9da2-4fda-942f-6adf50b5ee84/tudegezogajalaz.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/50079f64-78f4-4ac6-8f88-1312d2852eeb/26490844144.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/ab88b380-ec81-42ed-963f-d50ae0176c91/44727677588.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/c6ca46c4-44fa-47e7-abda-88149885fafe/pamobub.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/02ba9aea-d499-4d26-b723-4d91c572191c/dofojokelinoxasunulus.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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