Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d3c545229b7ba1…

MALICIOUS

PDF

32.3 KB Created: 2020-07-31 18:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0466a08262a95d97c45c537d228795ad SHA-1: aa4245a2c3175ef3921286f689beda07c2d278f1 SHA-256: a1d3c545229b7ba199935511fe4566d8ff901242816469b069c8235b4a5ade0b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=install+part+rh+20141'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and the malicious URL, suggesting a lure to external malicious 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.cc/pify?keyword=install+part+rh+20141
    • http://files.livingwordinkentucky.com/uploads/1/3/2/6/132695513/berilibikedopiner.pdf
    • http://files.classiccars-hotrods.com/uploads/1/3/2/6/132681882/fawapenula_kodujofamaxed.pdf
    • http://files.lorettacrogersnovels.com/uploads/1/3/0/7/130740625/redukuwovinija-vekuwezejulij.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/kotul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/49005790245.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/34796043704.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/lirisigeduver.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/nolezogumasalikasolipuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/satakazafoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/rafusopibabilape.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/69910342873.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4107173541.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/zixezuw.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_off000041bd.bin
09f379f5f8be34e7d750ed8d8889a0509fbe6e7b8e100861ce56db2648403653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41BD 5260 bytes
font_01_sfnt_off00005399.bin
f78390fd51943d9cb7135ce59f969c2ed4b47f58b7b0926aff809f7b751d34e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5399 9544 bytes

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