Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50a6371ca1ad3c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 17:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0e614352f824a9a37af8b22c602d53a1 SHA-1: 3789fe61198bd67695bffbb5e9b2fc4a88d139d5 SHA-256: 7e50a6371ca1ad3c3f2012a0cf12dee6fe4ec034c4cbca808259fe1deecca226
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=acute+otitis+media+guidelines+pdf In PDF document text
    • http://files.goytrewarmemorial.co.uk/uploads/1/3/1/4/131438120/6178266.pdfIn PDF document text
    • http://files.betterbaseballcoaching.com/uploads/1/3/1/1/131164260/7863246.pdfIn PDF document text
    • http://tolenoje.nbhsffa.com/uploads/1/3/2/6/132696021/kuviverigogezawigo.pdfIn PDF document text
    • http://files.narcisosolero.com/uploads/1/3/2/6/132695445/7109280.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/1/0436/3560/5664/files/xajubotowovuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/pioneer_rt_909_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/encyclopdie_visuelle_des_plantes_sauvages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/39013764987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/ptcas_transcript_request_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/2893596126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/43733462719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/tutuveruzitorafoxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/mimemotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8216/files/751855186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/pros_and_cons_of_euthanasia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/52027536675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/71059798181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/57110483242.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFC 5368 bytes
SHA-256: 5ef99a7084e59002a6c78ffeee52a9d9ed9a63ed6ecdd54c38958a4e61be27f2
font_01_sfnt_off00007d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 10080 bytes
SHA-256: 5b6f348939c2938a4570553cea55375e836af368140dec57ae8115d3b0a1ccfa

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