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://cctraff.ru/123?keyword=gpisd+calendar+2015+16 In PDF document text

  • https://cdn-cms.f-static.net/uploads/4410431/normal_5f976c977f8b5.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4389581/normal_5f98a4ccae21c.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4389606/normal_5f98999e1cf26.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4401696/normal_5f99292451402.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8b18a7ea364.pdfIn PDF document text
  • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005e93.bin)
  • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005e93.bin)
  • https://uploads.strikinglycdn.com/files/18b95ff0-1681-45a2-b35f-26229000c3a5/zexosimifojuxanupefiva.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/4f4c4a27-383b-491b-8c3f-8f59e5001b8a/41638932596.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/vodefugar.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/e53684ba-34c2-4b04-be69-17aded32386e/english_alphabet_tracing_worksheets_printable.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0498/0464/0420/files/solving_inequalities_with_rational_numbers_worksheet.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0501/4781/9685/files/comparative_vs_superlative_worksheet.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/47c766b8-53f2-43d7-88c5-5793d7c1f32f/mutations_worksheet.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0498/2167/9771/files/49574715350.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0488/0672/3749/files/tarjetas_de_presentacion_de_limpieza.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/22a41c8a-176e-4130-9b0c-a6b0bccc39d5/kufizunejadutojifisiv.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/a9ef3e24-08a5-450e-bb58-fa51004f46a1/22443770464.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/a6d56044-052c-4ee1-bfb5-576b2deab878/american_college_chest_physicians_dvt_prophylaxis_guidelines.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0478/4947/2159/files/missguided_denim_jumpsuit_asos.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/07152e01-ebb6-4f69-8364-65d8270658c7/77201808749.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0486/3734/5950/files/76574222306.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0459/2241/8839/files/does_coconut_oil_lighten_skin_yahoo_answers.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0434/3870/2748/files/taller_de_evangelismo_explosivo.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/7de11d7b-a545-4a65-bf80-37d11818b9b9/kemugomaxudodudaruban.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/formato_nota_debito_en_excel_para_descargar.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1a54bea5-f339-42eb-9c4c-e87c0c90a473/dameneta.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_off00005e93.bin)

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