Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9651a63fed3de6d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 05:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff65194927567fa9294364324299d581 SHA-1: 1527fdb1f5cd9754d3d16a0fc53acd1aa72f3d3a SHA-256: b9651a63fed3de6d6f70fd6dbf4ba9061503ead6692ec3fee1415b9294f94083
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, indicating an attempt to direct the user to harmful content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims.

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=diana+hacker+a+pocket+style+manual+7th+edition
    • https://static.usrfiles.com/ugd/b8c837_c5ccd4701b2d4f4f9a250e922d0e93c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d51006f17aa94a3fb46c378197389cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22b7b1c7ebd4c4f93e4430c7519d839.pdf
    • https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f772ebb2943a78ef9bfa6a3b7f4fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_742f67efcec24757a8a14ef10945a063.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa9edf5b06d34eaa87515a65ae1775fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_69474a4c75ad4a7082ffc3506eac9552.pdf
    • https://static.usrfiles.com/ugd/b8c837_ead31749629042c5bea6a0dfa8203bb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a85237944c9407db442d056a75f016f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8842bec2de24456a8403725306eee8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_52211d9f9575419aa4e67792eeb96d23.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b7f2b0c200b401ea62610955f037079.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b8d0798de2a4789a4b0b27ac73622b5.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_off00005e3d.bin
167e44c16a7236b4b57f95be30ade7617b81587c5e04e46fe080e3dd24ecd6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 5560 bytes
font_01_sfnt_off000070fb.bin
b11ec6262778a5faec9b1165585a324c8303b80ec9216c9fd54699afaf9af624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 10120 bytes

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