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://trafffe.ru/aws?keyword=sd+maid+pro+free+apk+download PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4451940/normal_5fa15ebc77ab7.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4411480/normal_5f99923eb859f.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4476001/normal_5fa7292c73417.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366063/normal_5f883886931f0.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366018/normal_5f98cc16a290e.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4387706/normal_5fa0fb7b6c5cc.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4388428/normal_5f9351f92eb67.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4420586/normal_5fa6bd73558a6.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4418175/normal_5f9a9ca5ae014.pdfIn PDF document text
  • https://roxoxurapu.weebly.com/uploads/1/3/4/3/134307884/9425136.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4380405/normal_5fa8381298dd8.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4369764/normal_5f8f559e45d3a.pdfIn PDF document text
  • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005de1.bin)
  • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005de1.bin)
  • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009501.bin)
  • https://s3.amazonaws.com/divikufifir/12913775338.pdfIn PDF document text
  • https://s3.amazonaws.com/zirojopemup/4545740298.pdfIn PDF document text
  • https://s3.amazonaws.com/susopuzupure/cysa_study_guide_download.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_off00005de1.bin)

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