Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e106de5dcf4d8af…

MALICIOUS

PDF

42.8 KB Created: 2020-09-05 18:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022cd970ef099e364b1feb1f5341d2fd SHA-1: 55067cbaab607a817175ce4141c74db114a77f57 SHA-256: 2e106de5dcf4d8af8884f2f4b2da75be451b822a4fdc18e3f950b740af9c0b41
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.link, which is designed to lure users to malicious content. The document body text, though partially corrupted, includes the phrase "Bmat section 3 answer" and the malicious URL, suggesting a social engineering pretext. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to obscure the malicious redirector.

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.link/wix?keyword=bmat+section+3+answer
    • https://static.usrfiles.com/ugd/2f3ac6_2ba7c35b262a4bdbae59c4246f2001c5.pdf
    • https://static.usrfiles.com/ugd/158fb9_bc41ac6ff40c4bcd8a9ecdf1cdc8650d.pdf
    • https://static.usrfiles.com/ugd/3b5dd9_e3b2d77187cc494fb1f0184091b0e066.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d73cf8433204135b91e152131b56768.pdf
    • https://static.usrfiles.com/ugd/7d21c0_bdc41afdd39d45ccbf98ffe0562e9b52.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f66f03741b147d385a27749e24f2d19.pdf
    • https://static.usrfiles.com/ugd/738632_ea132ee458c649c492bdeac56367a428.pdf
    • https://static.usrfiles.com/ugd/40512e_5f856d409eb7478ca3fe2214c72f89a4.pdf
    • https://static.usrfiles.com/ugd/c1615c_f27325292460400bb28608951b06d9e9.pdf
    • https://static.usrfiles.com/ugd/909b15_0161a72e5d6748428086edbb1d61516b.pdf
    • https://static.usrfiles.com/ugd/67f5f7_3d15dbce9c944681abb1065ec3e29298.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_97ccdf63d1584aeda0d50a2a6aa0c78a.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_off000069e5.bin
2740f39111b535b8f7eadb22bace89f493a29ba4730eff84c5f20f44a421d25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 5216 bytes
font_01_sfnt_off00007b9d.bin
53e30a78a1d858c9f7e301948e33ebcce2eede34e8700d1341778d8d865607b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 10372 bytes

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