Malicious PDF — malware analysis report

Static analysis result for SHA-256 c937bb3ff0804218…

MALICIOUS

PDF

51.3 KB Created: 2020-08-09 09:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf61808c7e7908cc46e206a5e80fd0c0 SHA-1: bf34822d1e04dffca269354e37f5abc6446bf665 SHA-256: c937bb3ff0804218bca1070f867cf15bcfaea1c21714c5c0675e8f67d84c00c8
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=comment+canaliser+sa+col%25C3%25A8re+pdf, is likely used to funnel victims to further malicious content. The presence of a link farm suggests an attempt to obscure the final destination or to leverage SEO techniques for distribution.

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=comment+canaliser+sa+col%25C3%25A8re+pdf
    • http://files.101american.com/uploads/1/3/1/3/131384663/3cc61b61a07.pdf
    • http://files.blueskyoga.co.uk/uploads/1/3/1/4/131437149/9953346.pdf
    • http://files.jeeeunhong.com/uploads/1/3/1/4/131408970/nujelajur.pdf
    • http://files.oswegoeasthighschoolbands.com/uploads/1/3/1/4/131438418/6551688.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/jarulodetepizixutur.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/22246114606.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/75497881258.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/movivagadowitidefigozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/zasevediwulevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1615/files/8th_grade_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/penjelasan_uud_1945_sebelum_amandemen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/mowegaxopot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/cary_grant_biography.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/zonidokilowebovalutos.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/degradacion_y_contaminacion_del_suelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/wugedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/93627457957.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_off000086ea.bin
3021d27ad3680fdf9f734bfa878e3f7f435770284c5a1ec4cf42b4c535fb22ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x86EA 5348 bytes
font_01_sfnt_off000098b9.bin
2e61cdaef8eeef1f5f0e1b3a59e5f3323854ff8b82f93fa0758ba7f286fbf216
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B9 11944 bytes