Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5392cd765719fc…

MALICIOUS

PDF

105.5 KB Created: 2020-09-01 01:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a07adf76f2c2404df7fae2fba602cbec SHA-1: 6016d768c323aae0e703d75734f3b13f5aef3834 SHA-256: ee5392cd765719fcafc46ec5c31c5c32e375914075cfab18af24ef7ff6efe28e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of these indicators strongly suggests a malicious intent, likely for phishing or malware delivery.

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/wix?keyword=chromatoid+body+formation
    • https://static.usrfiles.com/ugd/fd3290_5da35c8385fe40938e8b8cc0708c0abc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9548bc96a7074bd3b6b505c4f8f6eca4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2ea90ecca954ddb8538d840114365d5.pdf
    • https://static.usrfiles.com/ugd/12745a_6825e77e9acf404990f1043227136fae.pdf
    • https://static.usrfiles.com/ugd/cc089a_93e179cffded422c8ca463f911cc41d6.pdf
    • https://static.usrfiles.com/ugd/f515ca_c6537823584f4ece844aa5caedecb92c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d42d25c9b49e4e99b857bf4018648e8b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/gilitiveni.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/57334072919.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a4efbfdb90b458abc7854d09df9785c.pdf
    • https://static.usrfiles.com/ugd/834936_3ff9669ad4e146a3aaa9784fee4e3ab8.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_c2e711eb7959407b889ca4c09910624e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32d04414cd142d59305ce64f87a7e57.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_off000163f5.bin
833570fe5a80d90654ef7c92da309eaddc41b5d12765a5dcd0558ff316e3808a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163F5 5084 bytes
font_01_sfnt_off00017513.bin
9e844c113ac396020816cf0a57b0d41083e903d9cccbc746120ecbebe2af96ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17513 10404 bytes

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