Malicious PDF — malware analysis report

Static analysis result for SHA-256 263b6f40c57345aa…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 12:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c17306802452ce1880d80df9d6bfbb84 SHA-1: ffc64bdadd2e3598d568d5d217738a601af083b2 SHA-256: 263b6f40c57345aab8ce913238b5af36adbf55fb9406d3576b4c547d39656dbd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.cc'. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=esc+guidelines+2017+carotid+stenosis
    • http://kekuk.elementsbodyworks.com/uploads/1/3/0/8/130874064/3302694.pdf
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/ravejemejuwegavukeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/kiromekibabusozopol.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/free_printable_books_for_beginning_readers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/laguki.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/4156888794.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/jikizanapafufemab.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/cement_concrete_road_construction_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/9579995051.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/41811215085.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/definicion_de_biotecnologia_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/acuerdo_final_de_paz_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/43041902889.pdf
    • https://medlineplus.gov/carotidarterydisease.html
    • 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_off00006328.bin
2ba95f1ed973d27dcd27adefe5500f386381e7a33df2a5d56e8e27f91a5572eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 5468 bytes
font_01_sfnt_off000075d2.bin
7032b9852561b80b82438e0814076c35f8f72d08a2c9eb48649241bf5e38bf39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D2 10352 bytes

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