Malicious PDF — malware analysis report

Static analysis result for SHA-256 632ca1dd76d2e658…

MALICIOUS

PDF

51.1 KB Created: 2020-07-29 11:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1eb3fb025982a6b877216f1e332cfa0 SHA-1: 91099c80cc30a901a611044132547f3a91eec24f SHA-256: 632ca1dd76d2e658cc7603d91a92cb0fdc86f9cd2be5cf16e3518be434de631b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically linking to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'carburettor function pdf' and the authoring application 'wkhtmltopdf', suggesting a lure document. The presence of numerous external PDF links, many pointing to Shopify, further supports the SEO link farm and redirector attack pattern.

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=carburettor+function+pdf In PDF document text
    • http://files.healingartsofthesouth.com/uploads/1/3/1/4/131483002/4836768.pdfIn PDF document text
    • http://files.hebsolutions.org/uploads/1/3/2/6/132681476/mowojexarupa.pdfIn PDF document text
    • http://files.mybrightdelights.com/uploads/1/3/1/4/131483317/5c5e3e7b38eeea5.pdfIn PDF document text
    • http://files.strausorganizingsolutions.com/uploads/1/3/2/7/132740464/kapin-zamasobexijozaw-mamoruf.pdfIn PDF document text
    • http://files.greymatternoise.com/uploads/1/3/1/1/131163666/2416950.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/1/0433/5416/1310/files/nonavedepewesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/67713814735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/81568768624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/vemiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/90413533760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/nevaxufupikugevomipipivuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/12380156483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/xelirimisen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/59517350711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/fadewagufog.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_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 4984 bytes
SHA-256: b017d86dfba9e0adbebad20a46b906d02d7d866b08b11061f825eaa6be5a064c
font_01_sfnt_off00009c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C63 10088 bytes
SHA-256: da2e436dd68a2f6d6a63da52cb5103b271321e681b4af765e5a6d679eaac77c3

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