Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef9ad7082696442…

MALICIOUS

PDF

41.4 KB Created: 2020-08-05 15:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8105fb34e47d82bc0948f0645de4b71b SHA-1: a6d0aeddb6a5c910b131a2ec0a6e3bcdcd70fad1 SHA-256: fef9ad70826964427df6ec3e0b5c1b2a45c06d8dc816105d5e03b69803f9c47b
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, many of which point to what appears to be a link farm designed to obscure malicious redirectors. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=breviarios+fce+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

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=breviarios+fce+pdf In PDF document text
    • http://files.vickiofficer.us/uploads/1/3/0/7/130775033/8132972.pdfIn PDF document text
    • http://files.antonykolenc.com/uploads/1/3/1/6/131636954/vakodini_zoxodet_bemevavi.pdfIn PDF document text
    • http://files.godfuel.net/uploads/1/3/0/7/130775393/bivusubizisos-buxuripe-fabajet-gerozuner.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/1/0432/1984/5278/files/jquery_slide_left.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/twinkle_twinkle_little_star_guitar_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/bevuzimeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/43524952893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/mipagubokobikiwetex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/73598345132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/24772277173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/28745218544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/21612837907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/minoritezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/8125646747.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 6

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_off00006563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5228 bytes
SHA-256: 061bec3f46a850d55fa99e9d8bd31693e1483d61b67aa4a3b8503864da74bc37
font_01_sfnt_off00007744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 9944 bytes
SHA-256: 943e61309fcf87034bbc22fb488026e3bc0d34848c48d90d81af272e400b8cf9

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