Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a279f97f82bf57…

MALICIOUS

PDF

43.2 KB Created: 2020-08-29 02:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abdacf7171c37759e273242e4467bd57 SHA-1: 13d08cb83adc817b20f1c9e47b9aad958dd33c56 SHA-256: d3a279f97f82bf578544104e97f486d1ea7dbc1f4243dd4161b527b5a1ffa53c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=doom+foundry+rocket+launcher'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious intent. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several benign PDF links, 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.ru/wix?keyword=doom+foundry+rocket+launcher
    • https://static.usrfiles.com/ugd/b8c837_ed4c20ac26ab43e2b305166b466f6bc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f947be39e6411f9dfd343c436112b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e251d56313340988d39db694fd9b73b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6328d2548b3c44889836de23ef385a86.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/famudov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/gudawekudigije.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/bafadizivanamij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0898/files/34431022542.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/18581249993.pdf
    • https://cdn.shopify.com/s/files/1/0436/8505/2566/files/40035191738.pdf
    • https://cdn.shopify.com/s/files/1/0437/5163/7141/files/12497571890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/japawudesaga.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_off00006bb3.bin
806472bc619534e2f8cd3cc96a354c8552337203bddc98076b8bab28e1dce1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB3 5248 bytes
font_01_sfnt_off00007d6a.bin
685574de171cf56cef37fd25d5a086b1aa7e530faeafbdcabf5a6ca410276067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 10244 bytes

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