Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed426dbda0f33be…

MALICIOUS

PDF

32.5 KB Created: 2020-08-24 19:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d45b9531e9c9d7c188b7c9f5b28b34f SHA-1: 4a859ce6180fa50bd4963bfff94c8a30e4ff54f5 SHA-256: 9ed426dbda0f33be13e55a2481b3296b475ada54b979765781a41c24a495b8d2
194 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body appears to be corrupted or heavily obfuscated, but the presence of numerous links suggests a link farm or redirection attempt. No scripts were extracted from this sample.

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=kittydog+reference+sheet In PDF document text
    • http://files.keystonekidsgo.org/uploads/1/3/1/3/131381066/zonijejovamasebo.pdfIn PDF document text
    • http://zadede.beverleycrc.net/uploads/1/3/1/4/131407089/jedete_mafuzewomuwuf.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/1/0432/4658/3976/files/besowovowobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/3075754108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/new_jio_phone_ringtone_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1889/2958/files/xubexinumuruwagubokoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0685/9163/files/alesis_dm10_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9100/9442/files/50908867338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/95355972413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/51048399094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6324/1891/files/performance_assessment_report_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/building_skills_for_the_toefl_ibt_reading.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 2

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_off0000411f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x411F 5112 bytes
SHA-256: 06f8f69cfe0d625f3735ee9bd2a77d68112441051d567c1c4d716213c6186bc8
font_01_sfnt_off00005294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5294 10288 bytes
SHA-256: 581a8fbd20ecf59826fa86742e0af54f195e6ce81cd4009c72ca1745f7bf37d9

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