Malicious PDF — malware analysis report

Static analysis result for SHA-256 994bf1ddb1150659…

MALICIOUS

PDF

83.5 KB Created: 2020-09-02 00:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9b2eca6fbd1c6883d2b7e689e0404f SHA-1: efa3199f5b60fd01bbe0e590a2140f7bc3a8e1d8 SHA-256: 994bf1ddb1150659dfc237fb5cf76dff6b64e52b10296177ea841eb461d6ee53
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a search result for a vehicle manual. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm pointing to various benign-looking PDFs, likely to obscure the malicious redirector. The primary malicious IOC is the ttraff.com URL, which is flagged as a malicious redirector.

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=chevy+traverse+2009+manual
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/submersible_pump_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/reality_testing_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/howard_hill_archery.pdf
    • https://static.usrfiles.com/ugd/4f92c1_2c0d1b2cfc624145b3bb7f126434dbbf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/5740010965.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/descriptive_text_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://static.usrfiles.com/ugd/b8c837_6449315d0e44409598dd7ff201f59c26.pdf
    • https://static.usrfiles.com/ugd/0a51c1_7a82c84583ca480dbf1e6e044842d822.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_off00010887.bin
4c5d84cac666d2a78fa10dd8bd141abade498bdea3aa18c5aa8eb06f839780ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10887 5424 bytes
font_01_sfnt_off00011ac5.bin
d3a03979ec319d22a91eb3661a80be219247ebf18582fa817bae5150da381405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC5 11840 bytes

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