Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54b9e1ee944d6c7…

MALICIOUS

PDF

66.5 KB Created: 2020-08-06 10:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053aceb949ccad9a52dd7623d984b6d8 SHA-1: 268ba1180c24ee6c4e2d9b53b6c3fbe0b95b9158 SHA-256: c54b9e1ee944d6c78530f8a513470b614b9bb76b305e07a39528f7d64a9f9070
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests the document is designed to redirect users to malicious infrastructure.

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=b%25C3%25BC%25C5%259Fra+sanay+kitap+pdf
    • http://files.sa-machine-learning.org/uploads/1/3/1/0/131070597/1099442.pdf
    • http://files.bobdgorman.net/uploads/1/3/0/7/130775395/8591307.pdf
    • http://dusagofax.churchwellness.net/uploads/1/3/1/8/131871390/37df6f.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0597/files/thrombocytopenia_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/vobirok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/lavuniroxegotubod.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/19645290344.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/fireralutilawemepuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/57865874338.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/favovokuvovam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/fipik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/revert_commit_github.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_off0000c1ef.bin
2a21bbebbd09c9412d072489b8d2dd018d851e1e6e766c4ed185ccdc5a5c2827		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EF 5588 bytes
font_01_sfnt_off0000d45b.bin
da313d606791bcc4bc29438831fb8862418223d61d8adf785092077669931bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 12580 bytes

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