Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eca00ca6ed66ab…

MALICIOUS

PDF

36.8 KB Created: 2020-08-25 01:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0379d39da1657e6906536842dfcd3793 SHA-1: 32533df3c57ec21be3d4abeca5d8b60f8c74d419 SHA-256: c9eca00ca6ed66ab5add4b9732181da1978395b6dfc3f194459952b1bc4e5ba8
90 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/pify?keyword=wallpaper++love+you+mom'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly flagged this PDF as malicious. The file's purpose appears to be social engineering, tricking the user into visiting a malicious site under the guise of downloading a wallpaper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 2

  • 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.
  • 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=wallpaper++love+you+mom
    • http://files.emmaryanski.com/uploads/1/3/1/6/131607027/29997db0d.pdf
    • https://cdn.shopify.com/s/files/1/0451/8402/4725/files/satoshi_nakamoto_blockchain.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/15659162072.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/56562416738.pdf
    • https://cdn.shopify.com/s/files/1/0433/9256/5404/files/29799801900.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/52096905700.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/64784136066.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_off000051ae.bin
8ff303947efab5b2d18bc961f53b4cb92d0cfcc2fafd425506dc92fe18e06e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AE 4960 bytes
font_01_sfnt_off0000628d.bin
6522c2c2a944dd3e5d4b19b8a878117e45a3bfc0b699f32cc1b82905761e7220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 10780 bytes

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