Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f380548f8c16c56…

MALICIOUS

PDF

33.6 KB Created: 2020-08-03 04:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48670f51fce2cd7d1e6f22e93b35e83c SHA-1: feea8bc024f3e52ac010b1cf116077b13a02dab9 SHA-256: 3f380548f8c16c5670ac5d32f8a0ee51b64b06f250dec997558cd8161f16bd36
120 Risk Score

Malware Insights

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

The PDF file 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=lowes+enid+ok, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. 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.ru/pify?keyword=lowes+enid+ok
    • http://files.handmadeofvillage.com/uploads/1/3/0/7/130739991/9c00f47b3.pdf
    • http://files.theexcitededucator.com/uploads/1/3/0/8/130874204/xozupane.pdf
    • http://files.castlehill-training.com/uploads/1/3/0/7/130739916/f19381b23d.pdf
    • http://files.allseasonspr.com/uploads/1/3/1/3/131398497/cece0ea8.pdf
    • http://files.utopianlandscapes.net/uploads/1/3/1/6/131606878/gumixegexesagakopon.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/wokoda.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/91767359626.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/35857068141.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1464/files/86866046916.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/smith_corona_typewriter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/jirijakanuziratolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/10323080515.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/sugime.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/35501174911.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/rowogukerigudezaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/nafuxememadup.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/76696710540.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/19475825818.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_off0000488c.bin
906f39347ad4e19cb8f6688dbfd2947d5bd1c08e557b3d55c8ccc320002cf155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488C 4580 bytes
font_01_sfnt_off0000584c.bin
ed2e848af39113b515377fd7d50237032bb83ffb42928fa85aa24d88379119e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584C 9800 bytes

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