Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7e6ed42eae525f…

MALICIOUS

PDF

52.5 KB Created: 2020-08-01 01:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51b86fce25c5b551b3456f6c15420f9 SHA-1: 03b0bfb3cce02db1fceed2e7f2172200a3f84757 SHA-256: 4f7e6ed42eae525ff000f870a32387551265acdbf218d8416c4d1ccdd2ed50ff
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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=michael+madana+kama+rajan
    • http://files.earringsandwhatever.com/uploads/1/3/0/7/130775143/1043602.pdf
    • http://files.uofttalks.ca/uploads/1/3/1/4/131408353/bujudikowow_wekemozeg.pdf
    • http://files.faithsforsafewater.org/uploads/1/3/1/4/131438804/23780.pdf
    • http://files.whldesign.com/uploads/1/3/1/8/131871586/8d4cf5c8.pdf
    • http://files.faithsforsafewater.org/uploads/1/3/1/4/13143880
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/71353692702.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/lexututurodilemikow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/dijaronotipiwuvux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/fuliwiwujolazofifikegoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/sitegilejebesuregimexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7315/0869/files/netstumbler_adapter_not_present.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/54086136132.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/star_vs_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/22149461736.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/divimefeluduwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4210/3719/files/kuzijuxolitinovenedegax.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/dovidu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/47008108385.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/besebuwumekudujogipubelu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a44.bin
c992f6d19e4b7c0b829b72eed8a8dfc5382cbea9fc0c4b83c83bb10e4453c93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 5144 bytes
font_01_sfnt_off00008ba7.bin
5510fd69f6363115b3ef9a98df703f490c8b683f31ce7496cc7592bd90f46958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 10408 bytes
font_02_sfnt_off0000af6d.bin
c72ca0970d51b0a8ad78cefeb5ce5696832e14da31bd2128a4ba9c3d04a16bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6D 16104 bytes

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