Malicious PDF — malware analysis report

Heuristics 6

• 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.
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• 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/123?keyword=ppsspp+gold+apk+download+free PDF link annotation

  • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/7327337.pdfIn PDF document text
  • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/9567799.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://s3.amazonaws.com/vebogotexaf/ff_multi_converter_for_linux.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/3b25901e-6ad3-4a78-85c5-a2b90e65324e/tevoravivexiti.pdfIn PDF document text
  • https://s3.amazonaws.com/lorifumofelu/recursive_formula_for_arithmetic_sequence_worksheet.pdfIn PDF document text
  • https://sefudizod.files.wordpress.com/2020/11/wagapalaxutaf.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/e65a487b-90a6-4d18-b897-be377fb218d6/sutataxid.pdfIn PDF document text
  • https://s3.amazonaws.com/nademopor/saturated_steam_vs_superheated_steam.pdfIn PDF document text
  • https://s3.amazonaws.com/nijudow/78152282001.pdfIn PDF document text
  • https://s3.amazonaws.com/zinudipir/4321691096.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/f67f4307-a86e-4bc0-8ccd-c580549e4f13/66715505948.pdfIn PDF document text
  • https://miwomonifi.files.wordpress.com/2020/11/viktor_frankl_insann_anlam_aray.pdfIn PDF document text
  • https://nizowowe.files.wordpress.com/2020/11/waifu_academy_apk_download_for_android.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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