Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f371cd99ce54915…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 16:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7358635eeaa28a25e8c3e51f91e50836 SHA-1: 02018d48bf345a6b3884fa5f18022fe4a3c7cb4a SHA-256: 3f371cd99ce54915a13605e55522e2841cc0a41f836533037764fe351144ab5f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=bus+game++3d'. Another heuristic indicates a PDF link farm, with the first URL pointing to 'https://cdn.shopify.com/s/files/1/0440/3609/6150/files/64829487311.pdf'. The document body, though heavily obfuscated, also contains the redirector URL, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=bus+game++3d
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.pdf
    • http://files.pastorhurmon.com/uploads/1/3/1/1/131163914/2927684.pdf
    • http://nesokozij.westerncanonpodcast.com/uploads/1/3/2/6/132695375/338b96a379.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/64829487311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/argumentative_essay_school_uniforms_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/tijomegedusobebelaketa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/aws_certification_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/masije.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/8574849730.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/zejukevok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/50698808784.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/soveju.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_off00006db0.bin
21c673e7e7b6ed045acced8d942e3c27201ac1d6a2c9414d71fa31babc36d731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB0 5232 bytes
font_01_sfnt_off00007f6e.bin
aecc351d8589f4b9ee035cfb24384591956a2034275e21804a8d1c85258661b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 10384 bytes

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