Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ee43b1102576fd…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 14:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c7cef342eae2ea2854e232fa86b0fb SHA-1: 5fb2a342f8cf7ceb5de32e1d2ee0b11137dae693 SHA-256: 98ee43b1102576fd7ea9649113232096e79b51b2b8b956621d9c99e19305f611
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/wix?keyword=jetaudio+basic+review+questions', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents. The primary attack pattern involves social engineering through a deceptive link within the document.

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/wix?keyword=jetaudio+basic+review+questions
    • https://static.usrfiles.com/ugd/b8c837_db26fdf6248b4a04b308cdec5a01432f.pdf
    • https://static.usrfiles.com/ugd/73cb9e_484cf4fe611e44e394bd42a2a15d11b3.pdf
    • https://static.usrfiles.com/ugd/7d21c0_6b0f0904e7444448a207fb36e5d7d408.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a21f5c85e794d8d9114d9f97d24ec2e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/30186121554.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4aa6b03043540a28a1ca0aa45a52158.pdf
    • https://static.usrfiles.com/ugd/d162e3_478806545e4b41f1abfd103c0839079a.pdf
    • https://static.usrfiles.com/ugd/93971e_8b25bdde46a143c09d52774d1c38feb8.pdf
    • https://static.usrfiles.com/ugd/4b7290_04cce58b905e4501b22e3b25dac5b992.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/79408003833.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/81049006127.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_off00006701.bin
dc0bc2893e526b6d326c9e4869690d88050812dba8d64e017062ce9b91147acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5308 bytes
font_01_sfnt_off0000792a.bin
ccf7c212064aa043cf8dc05cf13fcc5015fd312b56c9c73d9dae16c8beef0f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 10828 bytes

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