Malicious PDF — malware analysis report

Static analysis result for SHA-256 5535c104bfc06f47…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 02:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac04007cbca61d5cda5ff6cd41e4ba92 SHA-1: 358e8a7f6d7e6faad6c5ed41fc7ee8db193688d5 SHA-256: 5535c104bfc06f47d8119f1cde90f5b6a015ca90dae227afb150cabe5ec4ffd9
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, directing users to a URL that appears to be related to video game cheats. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the 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.cc/wix?keyword=wolfenstein+ii+the+new+colossus+cheats+pc
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca669c5e18164dc7b1772e1030984331.pdf
    • https://static.usrfiles.com/ugd/b8c837_80f57ca9716e4bd58329a20da1dbc456.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a451e645f2e74ba58974d87bd8da19a0.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/3784967160.pdf
    • https://static.usrfiles.com/ugd/7ff653_09b8ee274dff4028bdedfe5048e827aa.pdf
    • https://static.usrfiles.com/ugd/432b07_6374105872674e27b7b257c706bd4660.pdf
    • https://static.usrfiles.com/ugd/e2c250_ff02c44183864e8d864cb5a4b16a4143.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_7b383e25da4741a1a997e1c04ebc862d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1681138beec549f89663bdb1f729f914.pdf
    • https://cdn.shopify.com/s/files/1/0445/4852/2143/files/ghazi_book_by_abu_shuja_abu_waqar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.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_off00006270.bin
b9563add4a5a55f592e2191ed54a981421fe27b20e4454b35c225aa07fa892ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5112 bytes
font_01_sfnt_off000073f8.bin
35fe7795e4aca43baaa2c698e0187fcbaf3a6f22d3e1b41a561e1ef4b0e51083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F8 10024 bytes

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