Malicious PDF — malware analysis report

Static analysis result for SHA-256 94618a3fde5087eb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 15:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 364002febc97098e2a0766a931eb022b SHA-1: 8ecc2c1cae46fcf948fe196e28ea9acf4d096ba8 SHA-256: 94618a3fde5087eb3c7d5fd0d83b0b61ef3b93dda3905b82fca87d232da3a2a3
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.ru. The document body itself is heavily obfuscated and contains a mix of legitimate-looking text and the malicious URLs, suggesting a lure to trick users into clicking the links. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=pdf%20books%20marketing%20management In PDF document text
    • http://bedubila.themindfulsquad.com/uploads/1/3/0/8/130813509/depekajafe.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/1/0435/5126/0836/files/redkaraoke_party_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/junatijexomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/89592914345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/92528511936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/58427462932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/15739178634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/nsk_ball_bearing_catalogue_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/bleacher_report_bears_vikings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2772/6489/files/8967212484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/velew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/93894961399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/20741224188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/ankylosing_spondylitis_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6652/2790/files/fomofowawarimi.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 1

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_off00005dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 5400 bytes
SHA-256: 61782adc56130fd7010c33021eedb8506ca220d140ff195b1d1e3074a674aa20
font_01_sfnt_off00007044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7044 9904 bytes
SHA-256: a3eeeec82f1b722f5812833d5ac03e0035ded33c54c33af9a26bebf7242c8b3f

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