Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6d431d546d7778…

MALICIOUS

PDF

60.8 KB Created: 2020-10-24 02:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-17
MD5: b3dc09604f4e9993d33e215bfca86fb4 SHA-1: 21e39de490559545bbc2b86a77a732fc082aace6 SHA-256: 2b6d431d546d777842644b1250b2d4fe6fe9ac8b9cc5d4f50f0e5713152f36a3
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.link/123?keyword=ultrasound+guided+ilioinguinal+iliohypogastric+nerve+blocks In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f923705ef019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f907b6916299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f8f7757e09ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5f8e2f36273d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ef12ac-cbec-490f-8173-096adc2c3ad3/82235443528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c449f2-3af2-4f17-9715-cc0d90aa5477/45809422028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793bbf0c-9091-4e2c-be5c-8be3cbcc0534/43253341755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e1282c-1ebe-42fc-835f-2445a73ad761/40860441939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/005e0724-9445-422f-b445-583363100e7a/36460913779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b70428-e301-40d0-8a81-336c0f561b49/xiwiwoxuxagulitejakotik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d44ce7-720c-4e78-bdf3-6fcd720252cc/alarm_clock_for_macbook_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3753/5655/files/second_derivative_concavity_inflection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9870/9409/files/enamrate_de_ti_frases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/5586/6823/files/cotton_fiber_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2353/5775/files/3cx_android_push_notifications_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/automating_inequality_virginia_eubanks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/head_first_android_development_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6399/5287/files/wamirikazavalabugim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/preparation_of_salts_o_level_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/golele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1623/9294/files/fanuc_control_cnc_programming.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_off0000ac46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC46 5692 bytes
SHA-256: cb89ae8ad3760e8ff679014f938b61ec487088b2badae33faacfdb1b62bcf827
font_01_sfnt_off0000bf9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9F 11004 bytes
SHA-256: 903e3bfc72a629f7b22ed3400e62946d3e46aad2b875726b3bd696014f4b78a3

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