Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c5f8b16a2fea0f…

MALICIOUS

PDF

53.2 KB Created: 2020-09-10 12:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0227b9f0ca6401d740c39844db7b2daa SHA-1: 5c7992db0814ee63172beba60104ba5be47c3908 SHA-256: 56c5f8b16a2fea0f9573dd3c41a16a82ed86058109185d13b857d27345502e6b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and a link farm. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely lead to further malicious content or exploits. No scripts were extracted, and the document body was heavily obfuscated.

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.cc/wb?keyword=process%20monitoring%20pdf
    • http://vekamaz.museautoproject.com/uploads/1/3/1/0/131069759/lolemitawi.pdf
    • http://gexewab.cherylhodges.com/uploads/1/3/2/3/132303382/kolikoxuvo.pdf
    • http://files.silkwoodart.com/uploads/1/3/0/8/130814475/babelu.pdf
    • http://files.joyfulnoisedoula.com/uploads/1/3/0/7/130776277/poxunav-saxobofelone-delajudogodevu.pdf
    • http://letexa.tofcogic.com/uploads/1/3/1/8/131856772/8911693.pdf
    • http://files.fishuntessentials.com/uploads/1/3/2/6/132695575/b0cf4.pdf
    • http://lizalal.rachelhenson.com/uploads/1/3/1/4/131453960/wimupibixozotet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/ladigobajumebinuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/wodisefiveb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6037/0339/files/saint_asonia_flawed_design_zip.pdf
    • https://static.usrfiles.com/ugd/804ff6_466574e0de0340e29f1176fe20391309.pdf
    • https://static.usrfiles.com/ugd/70c1f8_15447ae267c74abeace3fdfa9d7aed71.pdf
    • https://static.usrfiles.com/ugd/314c35_c8a9b7a5000842f0a506a6f4d09a5783.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_off0000923f.bin
07bd43f32d5a07e8439ebdf94012a7dc6b861baf4ba684c36ee35b37f2a19d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923F 5236 bytes
font_01_sfnt_off0000a3fb.bin
6733e4c37fb501b7e7ccad3bde2d03b59b6600b8040d48c0443c94cbcca40b18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FB 11120 bytes

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