Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f26b739d9d9a6b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-13 13:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c60c0f7e9791508cd98dadc4432d9a22 SHA-1: 3b4d5496e358a57bd0c8f551201bce2fa8ff4624 SHA-256: 85f26b739d9d9a6ba09060b2ee589fb827ee85edb69392677a75b91b31f5b09c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one that redirects to known malicious infrastructure at `https://ttraff.cc/wb?keyword=ccrn%20book%20pdf`. This indicates a phishing or scam attempt, likely to trick users into downloading further malware or visiting a malicious site. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=ccrn%20book%20pdf In PDF document text
    • http://files.tasteofexcellencepdx.com/uploads/1/3/1/3/131380305/mofeko.pdfIn PDF document text
    • http://sujududa.bpsascoutingmiramichi.com/uploads/1/3/1/4/131407164/929c92fb9b.pdfIn PDF document text
    • http://files.herbansprawl.com/uploads/1/3/1/4/131453657/398b028.pdfIn PDF document text
    • http://files.pipehouseplayagrande.com/uploads/1/3/1/4/131453896/lutoleginug_banonimasig.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/1/0433/0654/9406/files/82684129544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/dojogezujimonomen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/84466635281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3670/0835/files/cnc_machine_operator_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/78794636565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/form_g-_45_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/xovugupijedigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/enlaces_covalentes_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7011/8306/files/23915464682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/gejigolowogegokurisibon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/vigalimagitipetanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/12367385706.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 3

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_off0000695b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695B 4840 bytes
SHA-256: b7deec13cc4f7f5ae396b8cf4874cf4b9a2028a36d92e9606e6dd6a0e1586cfc
font_01_sfnt_off000079d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D7 10984 bytes
SHA-256: 895843531bc81da220e3297ef2e8413f712d8f6cdd07c166c7288b2d9c3554c8

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