Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2b64891cbd908f…

MALICIOUS

PDF

40.2 KB Created: 2020-09-20 15:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae853d7630e2c2d6bb44e350a3d9cc5d SHA-1: 0112efb8e6a35aafd0de94d6dfe851d1cef36446 SHA-256: bd2b64891cbd908f2d857ca457281d7ec2781fe94df5df70b99538d90404591e
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting the intent is to redirect the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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=estimate+quotients+using+compatible+numbers+lesson+5.3+answers
    • https://07b80ff1-862d-4351-9397-d1f76892f2f4.filesusr.com/ugd/7198c1_5a33774d30414044a58e5412a5ef34e2.pdf?index=true
    • https://5caec1ac-9cf1-409b-a91c-9b55dd9ab185.filesusr.com/ugd/3835dd_2ed16a4d6bb541a0b2fe1cfe88ceb0f3.pdf?index=true
    • https://cc752ab3-7223-4e07-851c-fdfd66931129.filesusr.com/ugd/44b221_13f116d195754d09ad238f5821b2bbc0.pdf?index=true
    • https://a7840387-169c-448e-bdd2-8d9f2acfaef0.filesusr.com/ugd/c4ccc4_ddc82e986b6f4c72b6258198d366d990.pdf?index=true
    • https://fc624bfe-71f7-49cf-8e3c-f6b46cc5d0de.filesusr.com/ugd/857e61_86558d45d8464811a96889bffbe5aed2.pdf?index=true
    • https://d934c7da-6f51-43e6-bea1-e6bf54b70f03.filesusr.com/ugd/3bbd68_6c09bf9b90eb4cf9833fc9ae6bf64db9.pdf?index=true
    • https://093e599e-646f-466c-9feb-90f8cbe146b4.filesusr.com/ugd/a98ecc_265b3a7d3d924f62a2aafb0fb2482131.pdf?index=true
    • https://47c2cab1-c767-4e56-b0c1-52386674475e.filesusr.com/ugd/d4da64_31742d6c683943e2988738bc7dfff107.pdf?index=true
    • https://32845627-a885-4422-b2c5-6b411c3c1eab.filesusr.com/ugd/740d8c_8a52a7bd040d425a82da94aaa9a6ec65.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f00.bin
43b43313bef001340d621ddfab2bb62a498c5b8bbb19a57b90b65307d751de93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F00 5768 bytes
font_01_sfnt_off00006298.bin
c97f5f1e74d89e07c17c6f8d76f216e51729cd1a65f90d2417b5e3b660339c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6298 10264 bytes
font_02_sfnt_off000085a3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 4324 bytes

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