Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2bfad1a649e1ba…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 06:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ae3135d1a24a55aa44d1efe86b7032 SHA-1: 14828f7f8f984e1420cc27d8de086e1881c7418a SHA-256: 8a2bfad1a649e1ba1631448d1e8f0cb86eda9739f37551c360fc95fe34b16083
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 high number of embedded external links, a technique often used to redirect users to malicious sites. One such link, 'https://ttraff.cc/wix?keyword=sim+city+snes+cheats', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to PDF files, reinforcing the link farm heuristic.

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.cc/wix?keyword=sim+city+snes+cheats
    • https://static.usrfiles.com/ugd/b8c837_598d2ef1033543f6ab62f6f62b077c07.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dc01a70be324d9d8874c81aa51b2a75.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d8263ad10c64d4d8e4d75ac9f909e81.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/topitevexegapefafenatijo.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/73400808749.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/wejunivoseki.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/fadakanin.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e37c5d833c42aeb7bbb095db66a8da.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cb8f81fe3a248409e0e21d2f015d495.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ead4b5d7db4e8381977a53c9133e96.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15f9d6ea05a441faa144be58545e69b.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9b540fbbe147f8a512187bec583164.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6fff296eabc47b6a2a84be79ee9b104.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6df7fcac15f4f7c90d3e1fd0e06dbb9.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_off00006be2.bin
f4c3b76f4c50b730216a64101d30c85ea729b61ab0260f1690fbcd4fe628f8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 5116 bytes
font_01_sfnt_off00007d23.bin
0dbf706c8710c8b664a1dbaea77a37d657d81d9fbe7d3bb0b4ed883e210a6268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D23 10428 bytes

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