Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b66554ea60f61cc…

MALICIOUS

PDF

43.7 KB Created: 2020-11-05 19:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-17
MD5: 7d23692ca3fc23ff6989077f1fbc7011 SHA-1: 4e11d65748403e342761c55ecaf4b9118c2e47a7 SHA-256: 2b66554ea60f61cc81dde9de396bf89ecfa573f389fd89cb5b9061f85bfba404
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=national%20teach%20ag%20day%202020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f90a317a934d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8ecd8368a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_5f9c821050071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f881ad56508f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fa3c3eaa84a3.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/e43c3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5f9284b416802.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/54027867-1f9b-49a9-80fa-9138d4354d30/5534433912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fc0715-3cfb-4cca-b2af-b0a046f1f7bb/dupuvaponuruluxubame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a445ec-f128-4b19-976c-34eb607b1f07/rhythm_heaven_fever_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7a01d1-7833-426a-82f4-5b18b92a8098/mijatomoragis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f89baba-ffbe-4da5-abd1-37ddb006c0d6/54645448613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15fabb5-7e39-48ea-9f34-4fd7eca24b49/take_me_to_church_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b4a755-e512-4e8e-9be4-bad9d764cd71/osrs_blast_mining_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af112f8-f5ab-4527-8235-cb1812347da7/63797660464.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_off00006998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 5272 bytes
SHA-256: 7639278f1bffd1ea95ce6d177cbcc0d44fca4873de2bd818bc0944f0b980e218
font_01_sfnt_off00007b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8F 11192 bytes
SHA-256: eee6d05e2bafcede975acca7aeb0d94ef50ad8ee24cfd1adb5f5ae0638889dd5

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