Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b363990adb5df84…

MALICIOUS

PDF

36.0 KB Created: 2020-08-26 02:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02098ed1f962ef0be924f321d9b39c9e SHA-1: 2cf8aa7f25da3be736b1b46f3920f778b919a7a7 SHA-256: 2b363990adb5df84bfe9a18dd5d1026cd38ac85f29f32b2f284793efec591b49
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/pify?keyword=how+kawaii+are+you'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing the attack pattern. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or content distribution strategy, with at least one other URL flagged as unknown.

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/pify?keyword=how+kawaii+are+you
    • http://vijitebi.mysummitagents.com/uploads/1/3/0/9/130969060/ee566ad61bb0060.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/td_corrig_d_atomistique.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/fewojuworaxilapedujapapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/34614708717.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/2159915037.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/cch_ct_file_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4586/files/barovenifutinagetar.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/variable_independiente_y_dependiente.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/discrete_math_symbols_cheat_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d83.bin
8a5f2100424bd36135e3e775347fd0f2f227037b19dd49702a382611a6b0f363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D83 4688 bytes
font_01_sfnt_off00004d92.bin
8e368c02ebd6ba6a034950c21a0b981c5831079e8cd55b945043330e91ad00b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D92 9832 bytes
font_02_sfnt_off00006e6d.bin
0318b400cbd4eb80818b7eb131bcca2e18f343f850c5eb1573e525fea31f4d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 16204 bytes

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