Malicious PDF — malware analysis report

Heuristics 5

• 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.
• External URI info PDF_URI
  PDF contains an external URL action
• 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://trafffi.ru/aws?keyword=cikm+2019+accepted+paper PDF link annotation

  • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/dikoraginubesaxelo.pdfIn PDF document text
  • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/kusesovurizo-wutanagivafewo.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8d99619c7fb.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4367310/normal_5f874c6453730.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4428334/normal_5fa10793143a4.pdfIn PDF document text
  • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/lujeduk-sejipimonedu.pdfIn PDF document text
  • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/382aef3a93439.pdfIn PDF document text
  • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/mozodobekurew.pdfIn PDF document text
  • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/wigitenuluso-babenutowag-fukozev.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/bd44e63d-800f-4426-ba41-da1e48901e4b/62919902820.pdfIn PDF document text
  • https://s3.amazonaws.com/tetazino/81304728525.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/56d21218-2202-4274-9896-370fd08add2a/l_alchimiste_paulo_coelho.pdfIn PDF document text
  • https://s3.amazonaws.com/jafujasiwetid/xejedezuligidobeb.pdfIn PDF document text
  • https://s3.amazonaws.com/tezofuretejom/51128276463.pdfIn PDF document text
  • https://s3.amazonaws.com/henghuili-files2/nubokuji.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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