Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2f1507de842dd1…

MALICIOUS

PDF

74.1 KB Created: 2020-09-02 20:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052656ba6e843907c5b82a5e2d47d68d SHA-1: 662e8755486809f433d4b9847dd1caab476da5c8 SHA-256: 9c2f1507de842dd13ed37de41934d2798f1508b6b695d6595c931eb04f121de0
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, pointing to 'https://ttraff.ru/wix?keyword=cartoon+network+video+er'. This URL is presented within the document body, disguised with a keyword related to 'cartoon network video er', indicating a phishing or scam attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign content but likely serving to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=cartoon+network+video+er
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/11027092917.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/46134552429.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/16586781717.pdf
    • https://static.usrfiles.com/ugd/3eed2b_3ea066760d044cb0ac875993527fde3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_29761a4f13a847ff9d8959fd0521ee1f.pdf
    • https://static.usrfiles.com/ugd/9c58c5_2080637cd8c24f92970e97d2e47a3a8f.pdf
    • https://static.usrfiles.com/ugd/269bb8_e9f7f5282b244a618f5eac9769741559.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/lefuwavok.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/zifik.pdf
    • https://cdn.shopify.com/s/files/1/0446/4807/1331/files/chemistry_practicals_for_class_11_salt_analysis.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_off0000d85a.bin
0aefa6e932a3a115fea2321f25e6446543eaf4531d24e129e88acf4a9d5c5895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 4728 bytes
font_01_sfnt_off0000e895.bin
996401a3e25544b3f9ecc12fbbdfbdc6b47f539ab5f20d8e27442e04380e3ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 16692 bytes

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