Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dca0cc9657c0c55…

MALICIOUS

PDF

52.5 KB Created: 2020-09-01 02:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0fa25dbe43014e3d24953752fc129f8 SHA-1: 74e830a08fce96e4ae7e87a6cfb46062dff7fd0a SHA-256: 7dca0cc9657c0c553393f579840240b6d48c626392c19d045e99e44effd553c3
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Dbq focus columbian exchange answers' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the primary malicious activity appears to be redirecting the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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.club/wix?keyword=dbq+focus+columbian+exchange+answers
    • https://static.usrfiles.com/ugd/b8c837_6a08c401915e4bd18991ef63afac1668.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c98e0e70f5b47a8b89258136dead7be.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a79308ff87841ee929654efaa6f921e.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/47478922653.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/fevokawalepagofe.pdf
    • https://static.usrfiles.com/ugd/45fd81_1da26e0448f849588cb39ed969d8e0da.pdf
    • https://static.usrfiles.com/ugd/0c268c_ef9def4301eb4a748b1ddfb2c1d63672.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/60176878713.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/77114872422.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_off00008c7f.bin
1d05b041d92a614464a209457eb6dcdba6d8d218af66267c35450057aee7081c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 5720 bytes
font_01_sfnt_off00009fee.bin
a5225f14a9a8eb87366fde71e969174e4b421ce1d7b2c72f6650e15c20a2d5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FEE 11080 bytes

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