Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66598f4107e2408…

MALICIOUS

PDF

32.9 KB Created: 2020-08-14 19:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28ae5bc9929ffe44eb18aa83b01e509 SHA-1: dff3c33ba7ac047f6deccfdd3d1a63518f60f7f0 SHA-256: f66598f4107e2408dac94d082550f8f1807242f9ebfb0253a879d9cb839417ad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=cacfp+participant+enrollment+form+texas'. Another critical heuristic identified a PDF link farm, suggesting an attempt to distribute or obscure malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'cacfp participant enrollment form texas', indicating a lure to trick users into clicking the malicious link.

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=cacfp+participant+enrollment+form+texas
    • http://files.kwikcashsolution.com/uploads/1/3/0/9/130968947/fugifuzuf.pdf
    • http://files.mintconditioncoinringcrafters.com/uploads/1/3/1/3/131384281/wibosagasitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/dapegumomor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/beginner_guitar_chord_progressions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/munaveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/77577102789.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/80451760906.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/doginawila.pdf
    • https://cdn.shopify.com/s/files/1/0450/8601/5640/files/sql_tutorial_with_examples_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/8782729034.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/kuzagufonuvumefosawazonaz.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_off00004536.bin
4876b0947c024dd6fd63b81a5c4e5ef7fa1e9b2d5cf73995e7601d45bda6bf22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4536 5136 bytes
font_01_sfnt_off00005699.bin
e854ee6d2f3ff2b211e7de1cf93ce5c0ca2e095d13d382847211865f59325f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5699 9536 bytes

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