Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d179164d054988b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-12 14:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8d0c26ed67e1e0b57a116d8cf05e9c1 SHA-1: 251ec707fd95e5d7004ab4a721c8b5b6ef81b021 SHA-256: 9d179164d054988b6a96c1d3259172ee77ccd2a0757e4c07c492c2275d94c708
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a free download for 'Don Quixote', but the primary link redirects to a known malicious redirector at ttraff.ru. This indicates a social engineering attempt to lead users to malicious content. 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.ru/pify?keyword=don+quixote+miguel+de+cervantes+pdf+free+download In PDF document text
    • http://files.biodiversitynz.org/uploads/1/3/1/1/131163540/kodajin-rirolilopupoka-nasibosisilimo.pdfIn PDF document text
    • http://files.stratuscorpfinancial.ca/uploads/1/3/0/9/130969004/2899676.pdfIn PDF document text
    • http://files.vierajrotc.org/uploads/1/3/0/7/130739783/8464069.pdfIn PDF document text
    • http://files.borninabarnminiatures.com/uploads/1/3/1/1/131164157/d7f3daf101da380.pdfIn PDF document text
    • http://files.oregonabslearningstandards.org/uploads/1/3/1/4/131407492/6554345.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/1/0431/6299/2799/files/71588941362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/94862115941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/wuwumukilubemitolamoxosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/colors_scale_1_to_100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/career_guidance_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/78504873194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0113/0645/files/63629832045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/wario_land_shake_it_iso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/11196876563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gotisirifiwixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/54578132864.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 8

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_off00005ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF1 5820 bytes
SHA-256: e2dc4f54e9a9e55cc6b5dc9756e9e6bbb583222969773e58d2246411bcfb0a6f
font_01_sfnt_off000073c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 10060 bytes
SHA-256: 62c794b9d61c99c830ad65cf4dfe6e64d71c8a1d7e032878f0c4e039a3c29031

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