Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84d3ae4f6f7e566…

MALICIOUS

PDF

45.5 KB Created: 2020-08-29 20:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d04623216ae3f4725461e28aefb2af6 SHA-1: 32110a6033c9efa5b6639b82a183b52edcf72847 SHA-256: e84d3ae4f6f7e566dfd5b55f645fac515dbea0ef74c32cea9db48be37af56caf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Spongebob squarepants' and the malicious URL. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=spongebob+squarepants+naughty+nautical+neighbors
    • https://static.usrfiles.com/ugd/b8c837_bbb42eef0c7743daa41a1dd219d3782d.pdf
    • https://static.usrfiles.com/ugd/b8c837_15ae33e778fe4ce399a15731f2ff40dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5e88d230c347a6a819567be00ac3b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c203be6fd04277a123e4f82d50e7ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc3593a299b44a2798f240f0b686a572.pdf
    • https://static.usrfiles.com/ugd/2ca09c_01369c8723a0499abbf03022468e9f97.pdf
    • https://static.usrfiles.com/ugd/576447_ec4b549550b540fe86ccb387e7c7a254.pdf
    • https://static.usrfiles.com/ugd/b8c837_179fd8786ac64f2db5de0ab89a31cd27.pdf
    • https://static.usrfiles.com/ugd/b8c837_d981cf72802143b6b7f0c835c72fc7fa.pdf
    • https://static.usrfiles.com/ugd/f46427_d510742841a44c41bc2241687951de2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbad77c40c464302a7f3396c96280163.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_off00007117.bin
46bd12666b02caf3bdc7f3c96639da100ce4853c79c08a800f8eff228e5abd65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 5664 bytes
font_01_sfnt_off0000845b.bin
31829360322ae65fb0a18884d16346d798db1d62409a4e8612623b778e002430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845B 10844 bytes

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