Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed55296cd0ba432…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 03:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9977519178e01ab0be4305501e15cd0a SHA-1: 87f21a8fe03961b1ff3e6bcae24657c60b9ba9a2 SHA-256: 7ed55296cd0ba43293cabf63a325b2fb0b2d001a4e03a322216ed8f43762ec84
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=war+thunder+new+tanks, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to 'War thunder new tanks', suggesting a lure to attract user clicks. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wix?keyword=war+thunder+new+tanks
    • https://static.usrfiles.com/ugd/d902bb_b92958f00a1440b1a3bb698e26d03333.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/a467d2_673edd620fcb4fe292c71638b64e76d4.pdf
    • https://static.usrfiles.com/ugd/5af86b_223438b60c5a441a938a869d133da8c9.pdf
    • https://static.usrfiles.com/ugd/b972d5_a2b91a5371de4fd59d7a35a40fca9b2f.pdf
    • https://static.usrfiles.com/ugd/23b571_0fa90eafbd1747079469fb38a8197b32.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/lukutiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/15240490390.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf3d8c6071a45e3a927d926aac3c04e.pdf
    • https://static.usrfiles.com/ugd/a467d2_c7e5417a6ffc4a9db58ae3df704a8bec.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_off000062cc.bin
a98af343e3424917398534be6ff7ce709f9d0422361bd55c216bc503a359b0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 5048 bytes
font_01_sfnt_off0000740b.bin
bce400bcd41f20f5dbef7ad0b03ed4a2805e9b1c49b240f10066ee5986c319fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 10152 bytes

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