Malicious PDF — malware analysis report

Static analysis result for SHA-256 8431b6e0b94352fc…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 12:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 703b71c4e0d7feb8ea1ce6f2797060a0 SHA-1: f3d6fefb8025510709cd1d9ac7452c8900ed48a6 SHA-256: 8431b6e0b94352fc28e0ff23ca7e6cfa33e2fc9e6701d5c516a3e3eceedfd7f7
120 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, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a reference to 'black and decker weed eater' which is likely a lure. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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=black+and+decker+weed+eater
    • http://files.truelifealive.com/uploads/1/3/0/8/130815026/tuxajabeka_mitinirezoxegux_jojodu.pdf
    • http://files.phoenixunionindoor.org/uploads/1/3/1/3/131382243/3345855.pdf
    • http://files.sidneyshelbychamber.com/uploads/1/3/1/4/131482997/3650357.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/97043261378.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xobujakixovofoxodepines.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/14554998303.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/43166666337.pdf
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/39902141071.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/17711263147.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/tevoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/xizosalarizewuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/handicap_placard_ohio.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/58645031015.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/wirasolofenurafija.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_off0000634e.bin
2786dff4c2c679aedd3d1ac726d79344b0bba201e1b805d8d08808b60664019a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 4960 bytes
font_01_sfnt_off00007452.bin
416bef3dcf304569f98eccb6c9ff85d7b272cb26ce12087671a66d30d75d845f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10940 bytes

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