Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad2929f22ac3353…

MALICIOUS

PDF

35.9 KB Created: 2020-07-31 15:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4baaef32ca52828cac626583287d219 SHA-1: 3832e235b2ad7fea6995d5a8d4c54c1c8d6f5339 SHA-256: 8ad2929f22ac3353bc3067932a1a7ecbd62abc6bad6a212e49a0f6490cda305e
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of the 'how to add notsobot' keyword in the malicious URL suggests a potential lure for malicious bots or services.

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.ru/pify?keyword=how+to+add+notsobot
    • http://files.bergenphotography.net/uploads/1/3/2/6/132682204/1172733.pdf
    • http://files.njagc.org/uploads/1/3/1/4/131437865/tuxafepukodoj.pdf
    • http://files.bluegalactictech.com/uploads/1/3/0/9/130969489/rosoxulotujawowipuw.pdf
    • http://files.draysonquarterbackacademy.com/uploads/1/3/1/4/131482915/felilon.pdf
    • http://files.draysonquarterbackacademy.com/upload
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/32454787888.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/gezogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/80269634340.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/52062028834.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/79776150519.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/malogelepowuralefepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/raduliwebunixutex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/wabaxuditenokeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3002/7157/files/23223396026.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/batuda.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_off0000524e.bin
99872a5a674b70a6b698728e01f17587e4b6ac5161672c58e8e7126d5a230d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524E 4504 bytes
font_01_sfnt_off000061a2.bin
d858b748f5c077626699eb24d9fb9f042a4e1df1e19385f470edf4eec08dcebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 9744 bytes

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