Malicious PDF — malware analysis report

Static analysis result for SHA-256 765a51eb7bbd845f…

MALICIOUS

PDF

37.2 KB Created: 2020-08-21 06:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8af22e7c4e80523a0e3f7ab1703e2039 SHA-1: 5d0c1a2469d95d3111f14bd9a3685f7191b8b0e3 SHA-256: 765a51eb7bbd845fefd9e4a19251a43fe8115bfc39ce58ceaaf0b58d2fd509d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and heuristics indicating it is a redirector link and part of an SEO link farm. The document body contains a URL, 'https://ttraff.ru/pify?keyword=burwell+livestock+market+report', which is flagged as a malicious redirector. The file also contains numerous links to other PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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=burwell+livestock+market+report In PDF document text
    • http://files.muzictomyears.net/uploads/1/3/0/8/130874676/37aae08.pdfIn PDF document text
    • http://vitabon.okobojiinterlake.com/uploads/1/3/1/8/131856725/pufavixa-tupagudiraside.pdfIn PDF document text
    • http://botevefev.cosmicsistershop.com/uploads/1/3/2/7/132712237/4c47ecdde78.pdfIn PDF document text
    • http://files.beanoartshop.com/uploads/1/3/1/4/131454620/rulenowutodal_risexabukim_povufefevulek_zilimewenefesu.pdfIn PDF document text
    • http://novep.magicandfun.co/uploads/1/3/1/8/131856374/750099a3e768.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/1/0428/9835/8432/files/45927795399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/numejisejarufutesuxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/javascript_string_empty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/phonetic_alphabet_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/83599115508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/92781934030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/16877577929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/13924833997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/61814317995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/76299462237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/executive_administrative_assistant_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8846/8385/files/77453228493.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_off00005332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 5344 bytes
SHA-256: 080edc7f3202c92b97fecc2a90ad7468710a34e06eb43183e34fb28b16740f7c
font_01_sfnt_off00006564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 10116 bytes
SHA-256: 58e8590d5ac2e49a8fd807d7d69a4a1eaddfde6b3d38c923c60458d2fc094b89

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