Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9c4586b85aac33…

MALICIOUS

PDF

36.3 KB Created: 2020-08-11 19:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06e2632432c3da464bae7fde71d86c17 SHA-1: fef83d0338555596cf5c836dd8c3b635e023416b SHA-256: 5f9c4586b85aac33e47f7f00948eb917a805b0ed087c860a157f28d73102d009
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that appears to be part of an SEO link farm designed for phishing. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting the primary purpose is to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=btec+level+3+national+business+student+book+1+pdf In PDF document text
    • http://sefomas.str8coastin.com/uploads/1/3/1/3/131398444/0090578b.pdfIn PDF document text
    • http://files.francisfamilyblog.com/uploads/1/3/0/7/130776370/9688007.pdfIn PDF document text
    • http://juxun.pickeringchurch.com/uploads/1/3/0/8/130874474/1099319.pdfIn PDF document text
    • http://roborip.fuali-barbados.com/uploads/1/3/1/6/131606060/91bd9.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/1/0434/8719/9394/files/wotamegona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/ctet_2020_notification_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/booker_t_washington_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6181/9045/files/libros_sobre_minimalismo_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/75174951974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/20362025891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/chiefs_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/frame_relay_configuration_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/eighteenth_brumaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7897/0533/files/bail_pola_information_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/viper_7345v_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/32547951.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_off00004e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8D 5584 bytes
SHA-256: c2cc62316d344a0d7c9a957c2ea8daa3ceafecd93f8079cd1cfa0f6cd793e6db
font_01_sfnt_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 10124 bytes
SHA-256: 73fff09dfd9a9e804e4ecef3d315b6a22b30e2f00cdb8406e134e0d9fec71836

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