Malicious PDF — malware analysis report

Static analysis result for SHA-256 54220605597642e6…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 04:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9971fb883d225cb591a8526b4b68a0cb SHA-1: 323b61245b7c67bbeaa990d66d39d421efbc4901 SHA-256: 54220605597642e6f10d34c4107f8fcaa846195173aa82b8e0c6587af3d08118
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of external links, including a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=japanese+porn+sub'. This suggests the document's primary purpose is to redirect users to potentially harmful content. The presence of a link farm indicates a potential SEO poisoning or traffic generation scheme.

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=japanese+porn+sub
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/painting_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/31425321122.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/linked_list_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/8865335993.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/lupimabal.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/connection_game_in_vijay_tv_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0465/5290/7934/files/96137364588.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/45922093861.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/add_watermark_to_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/singular_and_plural_possessive_nouns_worksheets_2nd_grade.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1b09fe3458b4864bedc3aacab44d508.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2685bb0124642d180590ce27b53133b.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_e59cc1e9c353473cbf3f697998af4d7d.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_f6dcbc9d9d9e4dfda763534a4de68e2c.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_off00005e9c.bin
f09e3e573d8420febc240dd1cf220fd1997a4dd2e2f8924c69ad2b05b3b253c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 4908 bytes
font_01_sfnt_off00006f50.bin
b0d5ce9650af35535e6744b812dcb8b167dbd07b4c0037181138a4a841536ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F50 14492 bytes

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