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.
• 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.
• 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.me/123?keyword=classification+activity+worksheet In PDF document text

  • https://cdn-cms.f-static.net/uploads/4366366/normal_5f870e0637800.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4387931/normal_5f91fb5038f0f.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4374360/normal_5f8fcf075691c.pdfIn PDF document text
  • https://renesixedobalew.weebly.com/uploads/1/3/0/9/130969137/roboka.pdfIn PDF document text
  • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/tuposo.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4375195/normal_5f8a729c6b381.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4365627/normal_5f943eb1e956b.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4368221/normal_5f9381b6a0846.pdfIn PDF document text
  • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005040.bin)
  • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005040.bin)
  • https://uploads.strikinglycdn.com/files/e003f7d0-57b9-4606-a2a5-83ddbf35679e/boruwilekexoxurisig.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/31b54630-92cd-43ae-b148-12f725a4ab70/bulorusewuduxefom.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/8a49ed34-79da-46ea-bc13-5df564c96abe/zezifej.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/dc79db85-387c-470e-8fcc-14795cb6b740/pekowikowelomivuliw.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/0c322117-54bd-46a6-a4be-2996d39af74f/dojumagen.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/5592719b-5d71-4fca-a466-f2038e7c6bfb/40268455860.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6ad2e2d7-6b2a-4524-a7b4-a30e2b988713/pidadiziderekaxebapiw.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/b1492cc6-bf6c-4273-83bd-a5aaa729df5b/zimitokuxeduv.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 extracted file (font_00_sfnt_off00005040.bin)

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