Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b68c694b2b8b02…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 17:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d391a7fb145eda196e1ce1587faa46 SHA-1: 3246c786b716ea7df88da7f9f5c458dbe04085ae SHA-256: b2b68c694b2b8b0268d6cc722367e5766cc2bf662676f4b3419748b4663cbda7
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, appears to be a lure related to exam preparation, aiming to trick users into clicking the malicious link. The presence of a link farm and a malicious redirector suggests this PDF is designed to lead users to a malicious site, likely for credential harvesting or further malware delivery.

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.com/wix?keyword=kpss+lisans+pegem+deneme+s%25C4%25B1nav%25C4%25B1+indi
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/78424607279.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/giweta.pdf
    • https://cdn.shopify.com/s/files/1/0436/6794/7673/files/xexedelajupukogibubuxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/honda_trx250ex_service_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f9e75267b74bf1862d9f47dfd99c72.pdf
    • https://static.usrfiles.com/ugd/b9801a_30f9a812f8ad438eaa23016fc66b8a1e.pdf
    • https://static.usrfiles.com/ugd/23e9be_1ffbc366852a4a97851b0ed9d850cee4.pdf
    • https://static.usrfiles.com/ugd/9b5f63_3ceb9231af8844799a14f619677426ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_06205787d8f742418bc3961336617df3.pdf
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/suzirezekinosexeb.pdf
    • https://cdn.shopify.com/s/files/1/0465/9560/4645/files/92909433832.pdf
    • https://static.usrfiles.com/ugd/b8c837_c62f1cc3a86943bf900ec6bbd8948d6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab2d59f632084276a5dc9f2cc36a11ed.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_off000049da.bin
297a46a670737102e4856db3ace1cca23ed05e3fe91631875cddec507da8d689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DA 5244 bytes
font_01_sfnt_off00005bab.bin
9844346a33a177c37eec0685e762a328eaed292e63201a42e0354af654cee157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 11220 bytes

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