Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aa70b621f64464…

MALICIOUS

PDF

39.4 KB Created: 2020-09-04 21:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013f15af0e9f54074839c29010a4f86e SHA-1: bf21364dabec38b3d68886586458b63dd96fb4c0 SHA-256: c0aa70b621f64464b2bf4ab2b56e496f158154bc7250462ebd30e3edbce2e17a
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 'https://ttraff.club/pify?keyword=similarities+between+phonetics+and+phonology+pdf'. This URL is likely used to redirect the user to a malicious site. The PDF also contains a mass external PDF link farm, indicating a potential SEO poisoning or spamming campaign. The ML classifier strongly flagged this PDF as malicious.

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.club/pify?keyword=similarities+between+phonetics+and+phonology+pdf
    • https://static.usrfiles.com/ugd/c6ac46_806b0796093f4e709b656a4538a6d726.pdf
    • https://static.usrfiles.com/ugd/a43ec6_cab55e6a218c440887535e7e9b288ca1.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a5ce99115d458bb9fffb5bc40a766f.pdf
    • https://static.usrfiles.com/ugd/b8c837_69fe03376c6847e08045daf54c459169.pdf
    • https://static.usrfiles.com/ugd/b80405_20a2f92c39cd4ad2b06802f080078f17.pdf
    • https://static.usrfiles.com/ugd/2e79a6_65c59249608e43b6a23c5b112309d295.pdf
    • https://static.usrfiles.com/ugd/b8c837_55c95d7425094209b1bd0b0057209363.pdf
    • https://static.usrfiles.com/ugd/062c90_73bc60d90b1242f8872f215ffe4ad187.pdf
    • https://static.usrfiles.com/ugd/5b604d_cd8eff4eca1c430eac4c0ed1e795e20e.pdf
    • https://static.usrfiles.com/ugd/cac9e4_24cc9f8f34b04429899253bfd059532f.pdf
    • https://static.usrfiles.com/ugd/a98ecc_ccfab1959b944ef8b4a25d96c5b09d41.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/all_about_me_questions_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0440/1224/1046/files/bejulanadowidaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/g_2_residential_building_plan.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_off0000596e.bin
10333e35788543c77371b1f196b24b6c8bd1771b60a2d571d1e2ba79b6090335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596E 6008 bytes
font_01_sfnt_off00006dc6.bin
f60534c125825757d43c498b5d8c4142fd4c4e096e08893ddf184dba382bf3f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 10008 bytes

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