Malicious PDF — malware analysis report

Static analysis result for SHA-256 326af8d5bc769456…

MALICIOUS

PDF

40.5 KB Created: 2020-08-20 00:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2db50efe9616afbf92bb67ba9d163c3 SHA-1: f495836a62b4435e16ac84007a150eb344f34909 SHA-256: 326af8d5bc7694565f9db3b106cb80b583944d8743886b2862735100778f667c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily corrupted, contains text fragments related to 'Adobe audition' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.com/pify?keyword=adobe+audition++mi%25E1%25BB%2585n+ph%25C3%25AD
    • http://files.vislitsandbox.com/uploads/1/3/1/4/131437005/sotaxavud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/armies_of_gielinor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/16425395647.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/pelenibuvufemejasapinu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/27307988976.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4696/files/56073191260.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/biological_science_scott_freeman.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/vesoragel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/antibiotics_simplified_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0450/7369/4870/files/panchatantra_kathalu_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9249/8850/files/metal_horn_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/kenyan_flag_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/webivixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/50059701188.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_off00005bfa.bin
837d60687b421a93a2bf91f1b77ca801010dd6805045cefdf1ab90495d296a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFA 5340 bytes
font_01_sfnt_off00006dbc.bin
787c80a184aec4604523cfbf0b27c6973319582f853b55ed053bca9f02e74c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 11732 bytes

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