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.
• 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
• 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://traffmen.ru/123?keyword=runoff+coefficient+table+nrcs In PDF document text

  • https://cdn-cms.f-static.net/uploads/4383138/normal_5f92273a57a47.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4414342/normal_5f952efdc5a85.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4414339/normal_5f9539af55d7f.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4391335/normal_5f98a08e6ea02.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8b5837d0f5e.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://datakedo.files.wordpress.com/2020/11/daremobun.pdfIn PDF document text
  • https://nofagixonuva.files.wordpress.com/2020/11/76944399871.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/51b0a303-20b7-4699-b95e-204ea4cd8451/um_cavalheiro_a_bordo_baixar.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/84b0c563-1ae8-4d79-af35-98d0d48a2f3e/53984099529.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/647e6964-abe5-4716-b72c-f446e82e13b7/bakafi.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1117fee9-1472-47cb-aa90-1456ddd35595/kanye_birthday_card.pdfIn PDF document text
  • https://pomutap.files.wordpress.com/2020/11/couchtuner_eu_com.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/2d34dd1d-034a-48c5-8f86-01a3d333ccd9/44027082964.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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