Malicious PDF — malware analysis report

Heuristics 6

• 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.
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• 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://ttraff.ru/wb?keyword=alphabet%20activities%20worksheets%20pdf In PDF document text

  • http://files.danavaproductions.com/uploads/1/3/1/3/131383305/7423760.pdfIn PDF document text
  • http://files.kidsquidstudios.com/uploads/1/3/1/4/131452794/jewutabune_kowido_xamafuvevasitaj.pdfIn PDF document text
  • http://files.cdebtherapy.com/uploads/1/3/1/6/131637325/841d823a2cc03bb.pdfIn PDF document text
  • http://files.visualronin.com/uploads/1/3/1/4/131438819/8598117.pdfIn PDF document text
  • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdfIn PDF document text
  • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdfIn PDF document text
  • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdfIn PDF document text
  • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdfIn PDF document text
  • http://files.earthtorique.com/uploads/1/3/1/4/131454850/nulijujo-zilepi-sepolajep-peburasi.pdfIn PDF document text
  • http://files.sydneynorthshorepolishsaturdayschool.org/uploads/1/3/2/7/132710575/gewuxoma_tezekuzevera.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://xarufuze.files.wordpress.com/2020/06/raxebebudarudoradimalub.pdfIn PDF document text
  • https://remumalu.files.wordpress.com/2020/06/52061225553.pdfIn PDF document text
  • https://xexufadotafu.files.wordpress.com/2020/06/dapidopoxiroxasomi.pdfIn PDF document text
  • https://kadawajoxezo.files.wordpress.com/2020/06/fapojitesigamopomexemexi.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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