Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74f9cf44ebb4cde…

MALICIOUS

PDF

51.9 KB Created: 2020-08-30 22:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022a83e54b0e24abb88cced7dde26331 SHA-1: bb7c40d4d06ee96fcb09b80e18dd0cd808715d0a SHA-256: c74f9cf44ebb4cde42fb13ecc769189e0e6cba91bdfe28880a8ef1b05ca49725
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, suggesting an attempt to lure users to a compromised site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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=jacobus+a+world+of+ideas+pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/lojud.pdf
    • https://cdn.shopify.com/s/files/1/0460/2006/7487/files/xisekepariwol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/59011586696.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/xaludugut.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/443886848.pdf
    • https://static.usrfiles.com/ugd/b8c837_018c0f3770224496953b0396ff042ee8.pdf
    • https://static.usrfiles.com/ugd/625844_04fece0168c745aa858b3b941d978a24.pdf
    • https://static.usrfiles.com/ugd/b8c837_924976c92036418caa81c284af223ef3.pdf
    • https://static.usrfiles.com/ugd/429b25_1c0265fa41d44d6aae85339fb04ce4ed.pdf
    • https://static.usrfiles.com/ugd/4b874d_c879647ea2d54cce8a9e3d333e6e9b0d.pdf
    • https://static.usrfiles.com/ugd/57c819_d68db166546a49328bc95483b6927d91.pdf
    • https://static.usrfiles.com/ugd/2f7815_a8c19eae82f649439980d27df9e0aa83.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_3c3e59c4d1754e9fbcc31f87cf9f4859.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b8a.bin
04d46998528bd218dcf8988a2261c28010d413176d7377284f154b7cb14b1988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8A 5372 bytes
font_01_sfnt_off00007dd7.bin
5999488002732b0f0723d716cec0eee1259b5d2994a6646fa6e5afaf1dbf04e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD7 4120 bytes
font_02_sfnt_off000088c7.bin
34331c89522ec6b6cf3abed77cb2b4bcdb7460fc6113260a20288827cf34b529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C7 10528 bytes
font_03_sfnt_off0000ad04.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD04 16036 bytes

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