Malicious PDF — malware analysis report

Static analysis result for SHA-256 509ffd696ea7bf4d…

MALICIOUS

PDF

53.7 KB Created: 2020-08-20 11:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c31b21b9abb5f216e0a8715147143b5a SHA-1: 182c94ba9b3a1484c83bccb9932fbf5c03d232f8 SHA-256: 509ffd696ea7bf4d7bdd1ccba66fe5e0794894c49f8a130280a912a9fc86dfc6
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a 'lol pbe launcher' keyword. The PDF also exhibits characteristics of a link farm, embedding numerous links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site.

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=lol+pbe+launcher
    • http://files.potomacschoolrobotics.org/uploads/1/3/1/8/131856160/9476628.pdf
    • http://files.antstrategic.com/uploads/1/3/0/9/130969944/9080154.pdf
    • http://lalofav.arlingtontherapyalliance.com/uploads/1/3/1/3/131383483/b22facfcf054cd6.pdf
    • http://files.heavyrent.nl/uploads/1/3/1/3/131398591/duwewufu-vexatanakoloju-getonebid-dapazawoketu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/delta_baggage_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/nopezo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/gst_annual_return_9c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/24134979195.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/guwaminide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/lewapurolefiluzafazar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/97301323466.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/vunawutumozox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/zowutu.pdf
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/barron_s_500_essential_words_for_toefl.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_off00008f64.bin
84313d6c24634870f6be9073d1916afcf613e85cad55f4bc9b845884b9a46288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F64 4924 bytes
font_01_sfnt_off0000a013.bin
d89c413b80022c3d2f19b66e70ba1341c63f9d61e4c25cdda2522049cb985497		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA013 13524 bytes

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