Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0dafa5122da852…

MALICIOUS

PDF

45.1 KB Created: 2020-07-08 15:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b336629291a22ca99886e75282d64b SHA-1: bce482e6c5f79a2ceddb982fc5a03c58016306dd SHA-256: ff0dafa5122da852e5bf82d9b1924beb20b59fec4471c76e804fc2e49f5fa2ee
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains numerous embedded links, including one pointing to a known malicious redirector (ttraff.ru). The document body also contains a large number of SEO-optimized PDF links hosted on various domains, suggesting a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wb?keyword=interactionist%20view%20on%20education%20pdf
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.pdf
    • http://files.tms-workshop.org/uploads/1/3/0/7/130739658/febubefuwavesoter.pdf
    • http://files.pondviewfarmmaine.com/uploads/1/3/1/3/131381722/6852231.pdf
    • http://files.almeria-estates-and-realty.com/uploads/1/3/1/4/131437351/fefozo.pdf
    • http://files.unklemikesplace.com/uploads/1/3/1/3/131380915/jawejevulenujo-vevisida-wodurefafin-dololejonozore.pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • https://nabavoramezo.files.wordpress.com/2020/07/39711035396.pdf
    • https://likabizev485265161.files.wordpress.com/2020/06/vozivedex.pdf
    • https://jipupuvemot.files.wordpress.com/2020/06/xezifikoronopekuxa.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_off000073ae.bin
3a329299095982233d5e6498280175c49947588712c0ed69f755e7c8243f8ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 5088 bytes
font_01_sfnt_off0000850a.bin
0006f82c31a596ec0e12298b884ed8f5be3afac38dfff272bebc8bcafd18a782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850A 10076 bytes

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