Malicious PDF — malware analysis report

Static analysis result for SHA-256 e788a44bedf74133…

MALICIOUS

PDF

48.0 KB Created: 2020-09-11 22:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c341f0f4926764eeae9bb8a68f049a75 SHA-1: fe0c38c58cb09ebd72bb4358df7a2a938da00c80 SHA-256: e788a44bedf7413384c28dad28c9713db024643e7b22ecba9cc9d3603ffadfb5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=nba+mock+draft+2015+bleacher+report'. This indicates the document's primary purpose is to trick the user into visiting a potentially harmful external site. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to mask the malicious redirect. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=nba+mock+draft+2015+bleacher+report
    • https://static.usrfiles.com/ugd/76156b_c6d3f40a5eb64bbca070855b9db9b986.pdf
    • https://static.usrfiles.com/ugd/3b47cb_7f854ee3f0284fdd8e6845d2a0ee3b0e.pdf
    • https://static.usrfiles.com/ugd/c068f8_5efcec50e7cf4a888852b27a7425ec17.pdf
    • https://static.usrfiles.com/ugd/1d64af_dad6770263f74e7ca902271c3ae7a8ef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/deciem_skincare_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7023/files/brmsx_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/89984693107.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/kotusibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/corrosionx_aviation_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/1690350049.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/all_quiet_on_the_western_front_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.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_off00007b95.bin
1fc0f3460286dc01ef0a98093c07649092b8960ea7c48b0950f1f56e2ad805f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 5840 bytes
font_01_sfnt_off00008f58.bin
0a04874e2db24d7c4cc24e40e6fcf6ee7a7a34b39fc7fe81de4549952add68be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F58 10340 bytes

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