Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73744b78f1a1b7b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-02 21:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af5bb8a4c48f111c4309fb63f21b785f SHA-1: a307cc7d7faf897ecb5f193deda0bd6eecb7887b SHA-256: b73744b78f1a1b7b83146cee7bc3164fdfe4a1690fc77afa2d74b41441422c53
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Case 580k parts' and the URL 'https://ttraff.ru/pify?keyword=case+580k+parts', suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content.

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=case+580k+parts In PDF document text
    • http://files.crossplainsdental.com/uploads/1/3/1/0/131070113/3542883.pdfIn PDF document text
    • http://files.rivertonmiddleschool.com/uploads/1/3/1/4/131438211/4363375.pdfIn PDF document text
    • http://files.julieanneason.com/uploads/1/3/0/7/130775265/nivuri.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/1/0437/5884/6109/files/fazejaxomesobowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/26775055758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6403/2422/files/jovubibeduxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/87405639089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/talafoxusawixenubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/paragraph_for_typing_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/nurirebemovorakure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/fibakowatatunolapofeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/bogozeterejet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/30218835055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/pupamisofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/figefopokatupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/83687843560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/bopezolupomiwodejawun.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 5

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_off00005744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5744 5208 bytes
SHA-256: 17732834657ae91279c32b7305b1e11ccd4ef72e4cc1a7fc1ada5a412d1c081c
font_01_sfnt_off00006907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6907 13356 bytes
SHA-256: a77847432864c0d5ef001d4a5cb5de4aeb442d97a799030e7c7c75f8dc408364

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