Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c913914670fd38…

MALICIOUS

PDF

62.6 KB Created: 2020-08-23 04:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8cc581488f6c4d5b1e1681233863a02 SHA-1: f856f15331dc4e8bad267e2b0fc953abe6bb7be7 SHA-256: 25c913914670fd389d635668c80a8c8d97db260c45f5acc34b4328ddfc069b01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm with numerous external links, many hosted on Shopify, designed to obscure the ultimate destination. One of the primary links, 'https://ttraff.ru/pify?keyword=the+ariane+5+software+failure+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to the Ariane 5 software failure and the wkhtmltopdf tool, suggesting a lure to disguise malicious activity. The ML classifier strongly flagged this PDF as malicious.

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=the+ariane+5+software+failure+pdf In PDF document text
    • http://vuvegeju.zero-waste-warrior.com/uploads/1/3/2/6/132680813/kijefigejila_bowegezuvuwifag.pdfIn PDF document text
    • http://files.balancedpets.ca/uploads/1/3/2/6/132682745/5990b46e.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/1/0434/5207/2086/files/forge_these_libraries_failed_to_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/best_android_graphics_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/27167653831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/2019_toyota_rav4_android_auto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/kepomipefurirokelakupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/compositions_of_trig_functions_maze_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/sevimikabozezutew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/sesiziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/livro_areopagitica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/suspicious_eyes_emoji.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 4

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_off0000b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 5296 bytes
SHA-256: 4bbcbef9ad1bbf8de01349d6e5bc234ebcadfe1b549b7d4318d7949d77ef5143
font_01_sfnt_off0000cb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5F 10076 bytes
SHA-256: f57a7385a109ba7e7e3fc3a830244a38be616d8a6e24160b7011f3c0e1c78721

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