Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ff50092d08f211…

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7c2ed8512e96d44a51fed7b02c3ade SHA-1: 66a781e328e6cf3b56bbb77b000bb76380d93f57 SHA-256: 45ff50092d08f211f76d3e06a326e9ee48e17d56fa75a83e9fc9bcba5b17e98e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely the primary mechanism for delivering a malicious payload or leading users to a phishing site. The presence of numerous embedded links, many pointing to the same domain, reinforces this assessment.

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/wix?keyword=20+pasos+hacia+adelante+jorge+bucay
    • https://static.usrfiles.com/ugd/f1780b_22268368aebf40c5a8f810c98a1e687b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf74f1ab28294179afd852799f9906ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_b252e68996f640b09c7a88bae1fdb07b.pdf
    • https://static.usrfiles.com/ugd/f96b02_1e717412d9c24e6d8be3b1ded2991897.pdf
    • https://static.usrfiles.com/ugd/b8c837_61d31f9b550c4b31886d953c2ad2bb33.pdf
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_563c20ddf4b743918a3473b6aaa67e21.pdf
    • https://static.usrfiles.com/ugd/097bd5_18a0681448904058b753dd758f986c6d.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/automotive_repair_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/change_list_to_string_python.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_off000050d5.bin
ef545d4925d8f6c361f15cb3dc3aff4f55564f7cf26c8d7b96b09e41b5f6c095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D5 5832 bytes
font_01_sfnt_off00006495.bin
2661edb988d488b0e43e5731b615c5f29b7dad1272d4bd1ec5235f4ac30bed45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 10480 bytes

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