Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2d75fb5ddbbf86…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 19:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98103b0c331bcf254d7750a2fad27ccf SHA-1: ac9b84bd70f617978ee9b6ef22033199c488cf09 SHA-256: fa2d75fb5ddbbf86558b1d4c99430995f778a866dc73a90b88cdabafcc3bc4f8
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm strategy to obscure the malicious destination. No scripts were extracted, and the family is unknown due to the lack of further indicators.

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=event+planning+business+proposal
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/51898210932.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/chunari_chunari_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/32484557681.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/fikar.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/acid_base_and_salt_class_10_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/objective_c_timer.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/rurofituti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/46547983935.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/63440693377.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/71951722469.pdf
    • https://static.usrfiles.com/ugd/fbccce_ad367c3511864f9ca0b749f42e259a9d.pdf
    • https://static.usrfiles.com/ugd/05900a_f5183cfee8b44b83a3de290dbc15a231.pdf
    • https://static.usrfiles.com/ugd/9219f8_db45ba0b746842deaafbcc3165e1aa6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_695ba211d7f043d898ec67f7cbd7a68f.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_off000062e0.bin
3ab397fec9ecd82ea8a5701ed43e9ede4abfdde856f4c31701d753b91b922bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 5144 bytes
font_01_sfnt_off00007471.bin
b02fbe0493cc3ae2742480ff4de63e7bc3009a7f3e8de8789a6b6cdb8f8a0396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 9996 bytes

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