Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d00c903b362322…

MALICIOUS

PDF

38.0 KB Created: 2020-08-14 03:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b30970ee53ef2e496c9fa713dedeedd5 SHA-1: 77d17c0bdc6a59bdc5ecd703da5daf31deb8a686 SHA-256: c7d00c903b362322cf4ddde802d1e844932f4e0eb23ea7c9737d9e780e7b8e63
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=email+account+list'. This link is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier also strongly indicated 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.ru/pify?keyword=email+account+list
    • http://files.fexasas.com/uploads/1/3/1/4/131407281/tizomiletofepuxekan.pdf
    • http://files.caywoodhandbook.com/uploads/1/3/0/7/130740571/digivi-laxob.pdf
    • http://files.samthoughts.com/uploads/1/3/2/6/132696018/koxububo.pdf
    • http://files.soundrelaxationcentre.com/uploads/1/3/1/6/131606550/8438a9.pdf
    • http://files.dayschoolgarden.com/uploads/1/3/1/4/131453706/e88ff777.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/68491508716.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/nowonelexetut.pdf
    • https://cdn.shopify.com/s/files/1/0437/2666/7925/files/95649347622.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/zusamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/born_arrow_games.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/61726556303.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/girikepuzefobufofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/wegalusibedo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/60399809968.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/aao_raja_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/como_leer_planos_arquitectonicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/77455015477.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_off000056e2.bin
438f1169257f562878ca932e9063a759478f8769a767a65e6da89e0edaba89d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E2 4804 bytes
font_01_sfnt_off0000671b.bin
da5bfb722516ce90a8b28ed6355fc52e1c46e2d92e9a2be1f3d8c6a0a4dab302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 10684 bytes

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