Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d6ed37293a254c…

MALICIOUS

PDF

56.1 KB Created: 2020-08-29 04:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591d54576eec6c8704c2b03180ec22fb SHA-1: 55dc506d9ac5d3de4907074ac9fdc3405f2354ff SHA-256: 48d6ed37293a254caea5d47f2669fa26c53103f3978b007559883d07d4f052da
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=dark+souls+3+darkeater+midir'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same URL. The primary attack vector appears to be luring the user to click on the malicious link, which likely leads to a phishing or malware distribution site.

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=dark+souls+3+darkeater+midir
    • https://static.usrfiles.com/ugd/b8c837_7ae8175f7d8343578c7e89f811b1cad2.pdf
    • https://static.usrfiles.com/ugd/b8c837_92a3d4561d52403aa067b1a14aca6fb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf0379e7f31b422aa60769b3024e833a.pdf
    • https://static.usrfiles.com/ugd/b8c837_84afb516428d45e69379c618e354cae9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8056aaab75594634a7a7887e2d8ef7f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e43635ec5705449cb025bf6588570ddf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d8fbc47cf994df08f2ab03af395cb97.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6119add9b6548a69bda4b1565afe2f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3ac721f6209430e97512b755d429ab6.pdf
    • https://static.usrfiles.com/ugd/b8c837_13373fdaeabe477bb609f81802faee59.pdf
    • https://static.usrfiles.com/ugd/b8c837_7268ad4c4e5245bcb3adf9abdd045fae.pdf
    • https://static.usrfiles.com/ugd/b8c837_452a67ee03204b04ad540fb7f604c35f.pdf
    • https://static.usrfiles.com/ugd/b8c837_98cd7f61adbf4dd3a33e90340b305af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f594087dc04933bad9918a5812b228.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7cdb4bd582949d7b3e22d49208ab37a.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a83.bin
2a6ea7427531a6b2b33836eaf1ca4056bf0b629197a446539b040b26d30e14cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A83 2984 bytes
font_01_sfnt_off00008527.bin
cd4f5eb439e4f39f3b6a78b4ffbd43f207eb59a130977cac08bd5720dda09066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8527 5200 bytes
font_02_sfnt_off000096c3.bin
b06bc6cc1f18082b567d718f4c8c6d17cf313d91feb60fa1a2babfad18c9969c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C3 10236 bytes
font_03_sfnt_off0000b9f5.bin
d45e50797bb3b88cd1503ba2e37a20d10847369a0d56a03d7086614190636b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F5 16704 bytes

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