Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3db66b2c54e784f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 21:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f3affb25fc612c3cf9c6d0c1680b919 SHA-1: fa9fabc7b81f8dcab402cdbd012b17f2d998d6c6 SHA-256: a3db66b2c54e784ffafcf1cf78a59e38fc589c696058882e44d69b74353936e1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/pify?keyword=2d+list+python, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to '2d list python' and the authoring application 'wkhtmltopdf', suggesting a potential lure related to programming or technical content. The primary attack pattern involves redirecting 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=2d+list+python
    • http://files.movehelix.com/uploads/1/3/1/4/131483025/775146619.pdf
    • http://files.traceynjohnson.com/uploads/1/3/0/7/130738870/02da2.pdf
    • http://files.helenforsterbridal.com/uploads/1/3/0/7/130775436/1138898.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/52283783071.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/60574541106.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/fadirisavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fonufefijosogigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/bimusosodaganuleta.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5831/files/purple_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/wojaxepibidajajelera.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/tanuja.pdf
    • https://cdn.shopify.com/s/files/1/0436/9694/7353/files/77128342876.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/tilimopozusotilotakopos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0686/9147/files/jofopibuvaza.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_off00005e28.bin
d2a3234be837bbbdedb137b1884e964195cd45b775b305a0152f2485da620822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E28 4880 bytes
font_01_sfnt_off00006eca.bin
065655adfda10e91d4a7b806710d97b8450cfe284b8b97b58674346f464f12ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 12860 bytes

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