Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cc6b01d50bdaed…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 09:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a74e5ae74f46d590f05d227611228390 SHA-1: fb53354bfe52b1bbd6ad6ff6db8d76938d9df172 SHA-256: b9cc6b01d50bdaedaa3b32f0e8aba2e249f876c1751e0450369a26e399f3647c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of SEO poisoning or a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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=angio-+seal+vs+manual+pressure In PDF document text
    • http://rewuv.ajhannualreport.org/uploads/1/3/1/6/131607600/bixisa.pdfIn PDF document text
    • http://pedoxogo.theofficialbobbycaldwellsite.com/uploads/1/3/1/3/131380429/8300921.pdfIn PDF document text
    • http://files.dongshiart.com/uploads/1/3/2/6/132683000/9293050.pdfIn PDF document text
    • http://tuxopu.pureessentialslightcenter.com/uploads/1/3/0/9/130969465/viburodopax.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/1/0449/6978/7560/files/64526719428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/13092532924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6071/9779/files/logo_quiz_answers_100_pics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/kobebajizikipewataxojixup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/30508883868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/31092484350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/xexil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/aadu_valarpu_murai_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/geometric_distribution_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/black_and_white_video_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/karawuwitaxusikonulusajan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/mponline_apsu_rewa_exam_form.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 5220 bytes
SHA-256: 96165489b68e497ec3a1ed8e54c95b9461293efa9fa191bd5c87a719c27e180a
font_01_sfnt_off00007905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7905 10496 bytes
SHA-256: 5797681d759f267aaefe74412dd649dedd9382aa5df767f87852c657381c12de

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