Malicious PDF — malware analysis report

Static analysis result for SHA-256 37368dd14b1a2c46…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 04:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92f5a46027cf5f8bf3772c551e0637ed SHA-1: 15a2af8756bb321f6b87ef901b94200518093455 SHA-256: 37368dd14b1a2c4640ffb950201531ccc622347118afac26bbc3c622d91c0043
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=bisection+method+step+by+step+pdf', is designed to lure users into clicking what appears to be a legitimate document link. The document body itself is heavily obfuscated but contains references to the same URL and other benign-looking Shopify links, likely to improve search engine ranking and disguise the malicious intent. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute the malicious URL.

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=bisection+method+step+by+step+pdf In PDF document text
    • http://fuxoten.carriesrealworld.com/uploads/1/3/1/4/131407406/vagegofa_notex_sovinew.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/1/0428/8777/4374/files/pibak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/12720689623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/ansi_b16_34.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/xafavetikuputitokebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/uncw_channel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/99645137264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/antibiotic_resistance_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/karifesiworesabasam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/1993_aashto_flexible_pavement_structural_design.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00005c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C46 5348 bytes
SHA-256: 42f6275208ea2a6dd90370dd5a032d7233d3108acae198f2e2d607e08b857cba
font_01_sfnt_off00006e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4F 14152 bytes
SHA-256: c214b0861ecda1231d49b22fa8b42bc5c7317663f7238488f1c49974b4743cbb
font_02_sfnt_off00009bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 16144 bytes
SHA-256: a0532d1212509dae036733b1fb6f303b0d7fd7a209d3928fdad713008da19d30

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