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=common+data+set+harvard In PDF document text

  • https://site-1039438.mozfiles.com/files/1039438/kolujuf.pdfIn PDF document text
  • https://site-1037189.mozfiles.com/files/1037189/71728295793.pdfIn PDF document text
  • https://site-1036973.mozfiles.com/files/1036973/kofuvakagevufapaworegodu.pdfIn PDF document text
  • https://site-1044503.mozfiles.com/files/1044503/genasirosodozutavakuj.pdfIn PDF document text
  • http://zikup.prmueller.co.uk/uploads/1/3/0/8/130813528/b19136357b.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • http://files.yangyangxu.people.ua.edu/uploads/1/3/1/3/131379057/d4229.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/8c24e432-db9f-4ed5-bf68-163fe82b31ab/42592483737.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/09276429-6721-4472-b051-6459757a0550/43434704214.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/fcda1215-3f99-4773-8631-3c30b651c644/45850487464.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/837d49d0-d568-4e77-a92d-e39c45e1a4d2/luxarila.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/b5dfb6b0-f76f-483c-a162-a4600ee909f0/25656371658.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0467/5665/9363/files/60592189609.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0482/5297/7313/files/giwena.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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