Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ef6351dc0748b5…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 00:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccda53acb7aadc55c575e8329ecdc3c2 SHA-1: a5c01e235429f2d2af62cc3073cb111766ac76d2 SHA-256: f3ef6351dc0748b5c8fa4ff52591a5aa39c29c655f8b0904e0a3f01564ec20de
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as ttraff.ru. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Bahubali 1 video songs tamil'. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially malicious infrastructure indicates a drive-by download or phishing attempt.

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=bahubali+1+video+songs+tamil In PDF document text
    • http://files.tcfrochester.org/uploads/1/3/1/1/131164452/6100557.pdfIn PDF document text
    • http://files.gailnathansonpaintings.com/uploads/1/3/1/1/131164081/gebuvazox.pdfIn PDF document text
    • http://files.distilleddew.com/uploads/1/3/0/7/130775310/7802163.pdfIn PDF document text
    • http://files.wrestlingdoneright.com/uploads/1/3/2/8/132814168/mazowixipiz-rafile.pdfIn PDF document text
    • http://files.oceanworksgroup.com/uploads/1/3/2/6/132680907/razupimurexubam.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/1/0438/5167/7856/files/xevufibufedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/the_glades_season_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/16782601319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/intensive_pond_aquaculture_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/automotive_labor_times_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/arthashastra_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/25630097328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/fuwoked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/can_you_annotate_in_ibooks.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_off00005f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 5444 bytes
SHA-256: f0472f86c7034c0a8f0b72bfbc8a16ea45e700cd2b8565251118a8fe5d715e69
font_01_sfnt_off000071dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 15472 bytes
SHA-256: 3d4bb201d845a8d032b441bacd8086353e2e0f354231920d9a653afea331bb06

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