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.ru/pify?keyword=corpus+linguistics+books+pdf In PDF document text

  • http://files.classroomacademy.org/uploads/1/3/0/8/130874266/9244340.pdfIn PDF document text
  • http://watifob.thomaslhiegel.com/uploads/1/3/1/4/131437423/jofotijixa.pdfIn PDF document text
  • http://files.shoptaylorwick.com/uploads/1/3/0/9/130969674/5923115.pdfIn PDF document text
  • http://files.chamedicals.com/uploads/1/3/2/8/132815924/buxazu.pdfIn PDF document text
  • http://tuwobugu.cs.ogdcl-nthp.com/uploads/1/3/1/6/131606066/b728b1eb1687951.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/html_to_c_itextsharp.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/canceleria_de_madera.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/vascular_dementia_journal.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/histogram_equalization_python.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/annexation_of_crimea.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/96713008998.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0437/4691/8551/files/principles_of_teeth_arrangement.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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