Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bb9137f55309a8…

MALICIOUS

PDF

61.5 KB Created: 2020-07-30 02:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12a93b37145d5b0a0ed104def6f0277 SHA-1: 882da8bcb8f23aa38d37c43fc4f60c5ec466712e SHA-256: 95bb9137f55309a8c0b488c51e59eb9a38c2091de05afa2397e7323b93ee904f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be garbled, but the presence of the URL and the heuristics strongly suggest a malicious redirection attempt.

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.com/pify?keyword=abordagens+pedag%25C3%25B3gicas+da+educa%25C3%25A7%25C3%25A3o+f%25C3%25ADsica+escolar+pdf
    • http://files.awakenteenleadership.net/uploads/1/3/0/9/130969923/9379379.pdf
    • http://files.otrphoto.com/uploads/1/3/1/4/131453302/3754708.pdf
    • http://files.dsimpsonbooks.com/uploads/1/3/0/7/130776055/xafilizeje.pdf
    • http://files.whsengineeringdesign.com/uploads/1/3/1/3/131383892/88358a7e.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1098/files/tobejowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/67241201115.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/dixoketap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/31770401314.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/bigopafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/22933019736.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6806/files/99419732347.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/43952682781.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/letepewujadamopavurop.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tirivovipitafibodoned.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/70546859999.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_off0000a931.bin
f76bb6a229c139a90456d8317d97aa3e86df3d862db3f8b217aaead7f54ae483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA931 5944 bytes
font_01_sfnt_off0000bc3f.bin
f84ed94333ea8696cbd9e7500b91efad0ef8734b7b6f4f5e648c0da2f8fc40c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3F 13772 bytes

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