Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6c74f595d50669…

MALICIOUS

PDF

40.1 KB Created: 2020-09-01 05:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff5a95e6e3a68fcf5da69ee89873395 SHA-1: 9d4bb0c64682b615ef9ab0e60dfcd1e7e189cc3d SHA-256: 3f6c74f595d506692d23f471366f17a16bde6c9dfea88ebb267ad001ea3d984c
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, pointing to 'https://ttraff.club/pify?keyword=positive+emotions+definition+pdf'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination.

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.club/pify?keyword=positive+emotions+definition+pdf
    • https://cdn.shopify.com/s/files/1/0448/5061/0336/files/jiketuwekojaverin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/absolute_phrases_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0454/1985/6028/files/44913424038.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/83890505882.pdf
    • https://static.usrfiles.com/ugd/ab0441_8e31024176e241ee98af272d9db4ac3d.pdf
    • https://static.usrfiles.com/ugd/510a18_3803ac6864a04c36823eb0562af61ce8.pdf
    • https://cdn.shopify.com/s/files/1/0464/6014/1736/files/wifoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9459/files/elements_of_music_straus_answer_key.pdf
    • https://static.usrfiles.com/ugd/0d9a50_f754d35e4261495da89f1995d33d4e5d.pdf
    • https://static.usrfiles.com/ugd/3e5d97_32447301452b4f6f90ab3cd3e6cb64f0.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_off00006157.bin
816f7a87fe02ffbe7cc1321783929407c587d9dae0d832074788368dbb788b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 4912 bytes
font_01_sfnt_off0000720e.bin
cec72498ba0cea493287b527ac8d23c3e9593b816e8b6fc8d6720422d52ccdec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 9912 bytes

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