Malicious PDF — malware analysis report

Static analysis result for SHA-256 332b0e9e6920622c…

MALICIOUS

PDF

36.1 KB Created: 2020-08-30 13:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bc4455bfc9499586d3346ca3f21630 SHA-1: 2e4682129dcc9d2a624ca476e1a29f63b75f00b6 SHA-256: 332b0e9e6920622c3929efb78a7bf8b186fa27b4ac77484fcb158779a80e9d6b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=yakety+yak+saxophone+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily corrupted, contains the redirector URL and a Shopify URL, suggesting a lure to external content. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=yakety+yak+saxophone+sheet+music
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/remember_you_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/fajinozok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/rosesimoripakovonuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/algebra_and_trigonometry_4th_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_d59cec74088c4297bda894a3449ecb75.pdf
    • https://static.usrfiles.com/ugd/b8c837_d930e6b2695648d2b78bdbcfcb878088.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/position_of_adverbs_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/advanced_workout_routine_for_mass.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_94ac3633ce504145a4ccd9b3d6c17cd7.pdf
    • https://static.usrfiles.com/ugd/ade4e6_f8431aae16cb41719f1d55dfff8a576f.pdf
    • https://static.usrfiles.com/ugd/3eed2b_05288e92361447b1b8450184299806ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_eab88a97b1ac4f1e93d369de24e04dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.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_off00004e1c.bin
ad2639b17b2b624211fad11d8cb3d7cba610a29e82b6b929066a12ca32f98f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1C 5240 bytes
font_01_sfnt_off00005fd5.bin
ac202ef6e93a7c8545589928167946da9267231ed4c06b8db5ba5f20cc5c429d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 10520 bytes

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