Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a4be4d731b5de9…

MALICIOUS

PDF

38.7 KB Created: 2020-08-29 04:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5821ac6dc2b59236fd8ff4a59357e031 SHA-1: 76d521bfe974c569e4c7a44d0a360c834c9d5a55 SHA-256: 96a4be4d731b5de9d1465fea2a0d43675f03b471f7c27b2fd3cb321789024f68
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous links to PDFs hosted on Shopify. The primary malicious URL is 'https://ttraff.com/wix?keyword=victor+raul+villanueva+rios', which likely serves as the initial stage for a further malicious payload. The document body contains garbled text and the authoring application indicates it was generated by wkhtmltopdf, suggesting it's not a typical user-created document.

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=victor+raul+villanueva+rios
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/zazexasigopigolitopezow.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/47232282341.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/86761054126.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/31888020858.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/alternative_energy_systems_and_applications_hodge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/vergilius_aeneid.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/42578733296.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/toro_recycler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/neger.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/renaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/admission_circular_2019-_20.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/30328886626.pdf
    • https://static.usrfiles.com/ugd/b8c837_04290c45a9dc44848b03c1ae7cd7f477.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/b8c837_287d2d8c63264107ba528b87198bb9c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_822f31ee723b42e396225a7d915ab1c8.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_off00005ba7.bin
9a5fc44e9e89e9503d2067611d0a69ccd8b2c7b5740363ee7c1bbacc4d613f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA7 4820 bytes
font_01_sfnt_off00006c10.bin
db6313ab00d21fa5270be6d007173053c14b6614f29e5ff807a50689e3f7a020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C10 9876 bytes

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