Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d23915d96c6a183…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 16:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90b2f5fd294e28fb8422efa851adcc9b SHA-1: e68d5f9611a5bbb5cf60ffb8812b4de725d8539c SHA-256: 9d23915d96c6a183da4a3f830b9d471799f89a56d45563321129df28b2626462
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to host malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=chamorro+english+dictionary+pdf', is identified as a known malicious redirector. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but does not provide direct clues to the user-facing lure.

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=chamorro+english+dictionary+pdf In PDF document text
    • http://files.loumurrey.com/uploads/1/3/1/3/131378950/javaxojuxi.pdfIn PDF document text
    • http://files.northwoodsyogaandwellness.com/uploads/1/3/1/8/131871674/9404797.pdfIn PDF document text
    • http://files.cardinalbeadcreations.com/uploads/1/3/1/0/131070792/jutab.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/1/0433/0687/7080/files/89853177043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/dinizelopula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/kenmore_90_series_dryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/73547678161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/lixikasuradururebew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/nozowefasuvalowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/kejabosububilobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/da_form_3953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/xilirulewuzane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/14153262170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/wemetanogaxajifebuvarozuz.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_off000064c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5576 bytes
SHA-256: 1f058edf03f47128c5a93e0683e796228a997eda087a00ab0e372b36b0bcedcc
font_01_sfnt_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 10612 bytes
SHA-256: 87050a4d13d76da5b95445b948a6e8576a538c7ce3c6b8ad0f3c111b1df49655

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