Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fb5a61595129a7…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 06:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42048d3eba1fb54ba21b706274e3b9ef SHA-1: 0beecc176f5e4dceccfbf5e9ec3784aa9e3cee24 SHA-256: 58fb5a61595129a7e3bcdddaf2ed5903c7279bae0dd35601128058e87178032a
120 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, specifically pointing to 'https://ttraff.cc/pify?keyword=chaotic+card+game+rules+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify, to potentially obscure the malicious redirector. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy strongly suggest a phishing or social engineering attack.

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/pify?keyword=chaotic+card+game+rules+pdf
    • http://bibir.cassandramlambros.net/uploads/1/3/1/4/131407406/4510211.pdf
    • http://files.restyle-homestaging.com/uploads/1/3/2/7/132710665/9463677.pdf
    • http://files.eastsideserves.org/uploads/1/3/0/8/130815009/37090d5fa37e6.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/segefoxur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/lugenojel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/accp_cough_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/19873314010.pdf
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/port_clinton_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/53428749029.pdf
    • https://cdn.shopify.com/s/files/1/0431/7908/1894/files/zinusopejepexugikosova.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/94425637568.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/jimubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/gesokukajipas.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_off000068f7.bin
43094974909e38caef39cd8f7f8ab51f548334818fcbf2ece98f1d83e58c143f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 5476 bytes
font_01_sfnt_off00007b66.bin
3616199889d0742ed203493c4de5993765182f979022b1afa5e3a04b275d7eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B66 9768 bytes

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