Malicious PDF — malware analysis report

Static analysis result for SHA-256 3193607c94414b7e…

MALICIOUS

PDF

36.4 KB Created: 2020-08-30 06:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfc412d913aefe3aed289963cb34a4e SHA-1: 4d6f21c00184679f814f48e16db3403183a08cdb SHA-256: 3193607c94414b7e9960cfe79ab94b9548e10c24fcdbe87dc4ee49520121cf87
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=belirtke+tablosu+nas%25C4%25B1l+haz%25C4%25B1rlan%25C4%25B1r+okul+%25C3%25B6ncesi'. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The document body, though partially corrupted, also contains this URL and appears to be a lure related to educational content. The presence of a PDF link farm further supports a malicious intent to distribute links.

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=belirtke+tablosu+nas%25C4%25B1l+haz%25C4%25B1rlan%25C4%25B1r+okul+%25C3%25B6ncesi
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/54498762723.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/nibosifu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/pathfinder_kingmaker_octavia_romance.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/danojozesu.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/d01287_d2a85fac43b7498e89ca80805218bad3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f3315c5e7464f1bb0f3d6fda657370a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3fe03b5f37441ef8720a6ec74cb2d99.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee156484cb8940ff8acfb0f0c7cf1a97.pdf
    • https://static.usrfiles.com/ugd/7dd30d_51807aabcdf04a47908cbb0112fb4e06.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_off00004e94.bin
6ddac5ad076e1e2f667bafaad3a2fb39db4dde66a55c1031eca8ae7e1e988056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E94 5360 bytes
font_01_sfnt_off0000608b.bin
7399c992d0e292906c159571a4f78dce257d0cf05e59405c3f68c760874bf45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 10928 bytes

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