Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7f587a63079d8…

MALICIOUS

PDF

55.5 KB Created: 2020-08-31 05:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 539d37c56c881779123e890626b74158 SHA-1: 01b778b54485f5db3249c01733e9f9b5c450050a SHA-256: bce7f587a63079d83b7502a38c1fdcde9f0e130d4751c438ba56ef569f72a25a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=lettres+de+francis+cabrel+en+frances'. Additionally, it exhibits a PDF link farm behavior, embedding a large number of external PDF links, with the first identified as 'https://cdn.shopify.com/s/files/1/0431/4890/2556/files/parasite_in_city_descargar_juego_gratis.pdf'. The document body, though heavily obfuscated, contains fragments suggesting a lure related to 'lettres de francis cabrel en frances', reinforcing the malicious redirector's purpose.

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=lettres+de+francis+cabrel+en+frances
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/parasite_in_city_descargar_juego_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/fijajolov.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/mathematics_worksheets_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/gujujipu.pdf
    • https://static.usrfiles.com/ugd/c1615c_553dd6564b3e4e3894354fb15ba86dfe.pdf
    • https://static.usrfiles.com/ugd/32777b_553ed571ab7445d0b0810aa7cb50610a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2f364a5180b4aecae29aac87ddfbe16.pdf
    • https://static.usrfiles.com/ugd/b8c837_d01a7cd95c214d478b765003b0f36d62.pdf
    • https://static.usrfiles.com/ugd/7f16bd_19701f1f502f4673b94639b534e6078c.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_90899aa88e574d21b221706e13404090.pdf
    • https://static.usrfiles.com/ugd/e32576_0c1921448b8e470dab0cf91c0f6eca29.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_01690c56d9a04f3ba593273caec6aa20.pdf
    • https://static.usrfiles.com/ugd/4725f1_829c34fc02984677b0bf9209cf630608.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_off00009608.bin
8fe8c1d3eb933db8c0d1063a9d3a83ed97f73ec351f9204f8fbfa7a337605acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9608 5096 bytes
font_01_sfnt_off0000a766.bin
4f5cbc7799dfcc55a5861dc021340fa3e3dfa1fb030e1f52e7f8ad8779a76541		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA766 13080 bytes

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