Malicious PDF — malware analysis report

Static analysis result for SHA-256 40759c2c2dfb0e82…

MALICIOUS

PDF

49.9 KB Created: 2020-09-01 18:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d2a9af3b1896a652a16be71334c8d0 SHA-1: 69a5c7aad46e0448b2984e2a3a98c90c9542e419 SHA-256: 40759c2c2dfb0e8296d0e007a115b3f132034eabcedbf82233e90d88df14dfd0
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it contains a redirector link to known malicious infrastructure. Additionally, it features a PDF link farm, with numerous links pointing to external PDFs, likely to obscure the malicious destination. The primary malicious URL identified is https://ttraff.me/wix?keyword=global+perspectives+igcse+individual+report+sample, which is likely used to lure victims into a phishing or malware download page.

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.me/wix?keyword=global+perspectives+igcse+individual+report+sample
    • https://static.usrfiles.com/ugd/4aae87_809afba3a9d14c6da11cc1fccff41952.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/ec0c41_40216d8c043a4d70ba4a08aaed165552.pdf
    • https://static.usrfiles.com/ugd/bf650e_545a417065c24d659c6b5ddde6745ce5.pdf
    • https://static.usrfiles.com/ugd/b8c837_33d8c61b388f47fc97ebbf1c00f5c01f.pdf
    • https://static.usrfiles.com/ugd/67f5f7_909c58d7790e446a9ba02ce9464c7428.pdf
    • https://static.usrfiles.com/ugd/2e79a6_5f6e694a209c4eda8c01d8dc33dc35b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_79db1b3cedb34562867ac8531568f8aa.pdf
    • https://static.usrfiles.com/ugd/eaf48f_b4093eaccb4f42f2a87db35a66cacf94.pdf
    • https://static.usrfiles.com/ugd/b56239_b520f12430384bbab530dfa466e4249c.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_off0000830b.bin
44b66ddd2e646b1bbdbc5b0c76bab942dd7c65984b8bdeee9dbb079c0fa0a11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 5624 bytes
font_01_sfnt_off0000961b.bin
0d39e899999d5a3072ec5d5d79c9d49baff29cc4ef5266218268f0e32be29c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961B 11040 bytes

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