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)
MD5: 8105fb34e47d82bc0948f0645de4b71b SHA-1: a6d0aeddb6a5c910b131a2ec0a6e3bcdcd70fad1 SHA-256: fef9ad70826964427df6ec3e0b5c1b2a45c06d8dc816105d5e03b69803f9c47b
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.vickiofficer.us/uploads/1/3/0/7/130775033/8132972.pdf
    • http://files.antonykolenc.com/uploads/1/3/1/6/131636954/vakodini_zoxodet_bemevavi.pdf
    • http://files.godfuel.net/uploads/1/3/0/7/130775393/bivusubizisos-buxuripe-fabajet-gerozuner.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/jquery_slide_left.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/twinkle_twinkle_little_star_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/bevuzimeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/43524952893.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/mipagubokobikiwetex.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/73598345132.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/24772277173.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/28745218544.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/21612837907.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/minoritezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/8125646747.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006563.bin
061bec3f46a850d55fa99e9d8bd31693e1483d61b67aa4a3b8503864da74bc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5228 bytes
font_01_sfnt_off00007744.bin
943e61309fcf87034bbc22fb488026e3bc0d34848c48d90d81af272e400b8cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 9944 bytes

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