Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbbca093cbc23bcf…

MALICIOUS

PDF

42.5 KB Created: 2020-09-05 16:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b33a1e2d3a02f89709a86bd561ee14 SHA-1: 61e15250d9fb2d04d089e68d4be21f7b71cb197b SHA-256: fbbca093cbc23bcf828609eb8007bbd8b7b68064ff4a51014148dceb6a65f3eb
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.club/wix?keyword=classical+gas+sheet+music+pdf, which likely serves as a redirector to further malicious content. The document body itself contains garbled text but also includes the same malicious URL and numerous benign-looking Shopify URLs, reinforcing the link farm observation.

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.club/wix?keyword=classical+gas+sheet+music+pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3288/files/57369273259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/client_engagement_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/railway_psychological_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2934473971.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/6425250791.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/xepipimijusodijinoraze.pdf
    • https://static.usrfiles.com/ugd/078c79_039bc619f1174cf889a5ac3dd7f8d088.pdf
    • https://static.usrfiles.com/ugd/18ee90_6ddb88ffc34b42d6a5f723bfcd610a22.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/13984157584.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/vexexibezorakerirusidu.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_off0000690c.bin
7b75a1d3e210876757756e4c9d8e004070861681501f2076d085564ffeb8aa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690C 5376 bytes
font_01_sfnt_off00007b2e.bin
ba701e09f12ff54550679f48d85004dad8eb49ea6c9e95d8f04cd1085e78bf30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2E 10120 bytes

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