Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7dcc78f8576964…

MALICIOUS

PDF

33.7 KB Created: 2020-08-22 13:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f43382488056fd3076dba3ef8410fbe0 SHA-1: 4c122f7f60ddc0ff69b7ed97aa98050628b84ddd SHA-256: 9f7dcc78f85769646a495484927984b9426287d240f6fe1abf2d4b6621223deb
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as an educational worksheet. The document body and embedded URLs suggest a lure to a phishing or malware distribution site. The ML classifier strongly indicates malicious intent. No scripts were extracted, but the presence of multiple embedded URLs points to a link farm or redirection strategy.

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=verb+moods+worksheet+8th+grade In PDF document text
    • http://wemanobew.upstagenydanceacademy.com/uploads/1/3/0/9/130969525/lapubodujexu-pejitug-vanutizoju.pdfIn PDF document text
    • http://nefizovad.nzimahse.com/uploads/1/3/1/0/131070571/7639233.pdfIn PDF document text
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdfIn PDF document text
    • http://files.jewellerybyjody.com/uploads/1/3/1/4/131437464/fafubidugef.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/1/0465/0657/3982/files/willingness_to_pay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/bugeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/39961409925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/tabusoxuwuwodovibug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/vybz_kartel_mixx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/jasper_report_java_library.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/just_mercy_bryan_stevenson_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/43237467806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/zovakukexokaxopazotinujok.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_off000043fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FE 5660 bytes
SHA-256: 08dbbf2f84aa1c2613304a46a0f6b76c665eec85bb080062ba6262ad990999a6
font_01_sfnt_off00005730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5730 10200 bytes
SHA-256: 73b42da5b5f9b93a35e334c0775feb03be1f526bf1259b0ead2446a11fac8ec6

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