Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a7937adee945ec…

MALICIOUS

PDF

63.9 KB Created: 2020-08-25 06:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce11b3318d13d93b2c2c72bf1fb6e831 SHA-1: 972abf1a28390947aa2f296caac4d4ed6520841e SHA-256: 15a7937adee945ec4e0e55a2973229d972a9e69d50384cd0c01340a8ee910eed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to create a link farm, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary redirector URL is `https://ttraff.ru/pify?keyword=biogas+production+from+food+waste+pdf`, which is also presented as an image lure for a 'free-download phishing' attempt. 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=biogas+production+from+food+waste+pdf In PDF document text
    • http://files.goudenkolibri.nl/uploads/1/3/1/3/131379748/jazisu_puvuxadolu.pdfIn PDF document text
    • http://files.brucedouglasreevesauthor.com/uploads/1/3/0/8/130873997/5cfa47.pdfIn PDF document text
    • http://vubofimur.susanamons.com/uploads/1/3/2/7/132740373/5558252.pdfIn PDF document text
    • http://jasef.traininghousecalls.com/uploads/1/3/0/8/130874332/76632.pdfIn PDF document text
    • http://files.mscommons.com/uploads/1/3/0/7/130775027/9322445.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/1/0430/6753/9605/files/joburajenila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/english_amharic_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2943/7344/files/yahoo_messenger_old_version_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3268/8293/files/jodafowabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/comparative_advantage_practice_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/juxozuwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/wefaxatuwibagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/75749639276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/95151366345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7596/2789/files/english_reading_stories_for_beginners.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 2

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_off0000bc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7A 5584 bytes
SHA-256: e073265c3fac745f625cc4163843753b87fdbfca82c0fdfe522a8a12f07311dc
font_01_sfnt_off0000cf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 10168 bytes
SHA-256: 98a1d04bcd82c6e6061fb162c6c72faffb4de4829a1ac5f5bd27b2a5cbf495d8

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