Malicious PDF — malware analysis report

Static analysis result for SHA-256 43737d0cb6c9321d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 23:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80fb0b84a8896232b4750b48de5a1a3c SHA-1: 49f9b09270d81411c7b68ba8cb6657568f313ed5 SHA-256: 43737d0cb6c9321d67efeb4be037eae0d9c0caeacca7add9eb9bf4eb6b0fe751
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=iso+9001+audit+questions+answers`. The document body also contains this URL, alongside numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely intended to redirect users to a phishing or malware download site.

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=iso+9001+audit+questions+answers In PDF document text
    • http://files.spaproductswholesale.com/uploads/1/3/1/1/131163943/6599963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/attainment_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/fepetakevifarosiposev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/prentice_hall_biology_book_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/glencoe_algebra_1_3-_1_practice_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/backroom_casting_couch_compilation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7958/9283/files/battleground_survivor_battle_royale_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/93793130355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/58348864997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/52163875495.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C41 5176 bytes
SHA-256: 9cb9b4cedd175f0f46039424346709673958fe4538d0e3bbbdf9f3a7a99e1086
font_01_sfnt_off00006deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEB 9912 bytes
SHA-256: 0229854f978cbf38b81f8e75784ac732258ec7c94101b17b392f7cb0de5e6647
font_02_sfnt_off00008fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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