Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e423c0dbd4b37a0…

MALICIOUS

PDF

53.3 KB Created: 2020-09-07 13:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af68e8c6b85af5b714d7c5c9fd44e5f6 SHA-1: 5a5a02fe23fda902ed8b8a762c7b71855c624644 SHA-256: 8e423c0dbd4b37a02e84aa18f550b477479bd92e1eab1da15ca461ed752e8523
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=annie+backing+tracks'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broad distribution or SEO manipulation tactic. 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.link/wix?keyword=annie+backing+tracks
    • https://static.usrfiles.com/ugd/8cbfce_851e8d1b53174a07ac7abdba1b0bdf05.pdf
    • https://static.usrfiles.com/ugd/804ff6_02ff93ea2fd74cc598661e5903f8df13.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_636e2d8321864c609c0787b920ff8326.pdf
    • https://static.usrfiles.com/ugd/b926a8_d664eeddd2074dab81f00d19e47858d7.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/1742857324.pdf
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/indeed_augusta_ga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/barberton_police_incident_reports.pdf
    • https://static.usrfiles.com/ugd/65d6f7_c5501db58cd1424aa4b613401570789c.pdf
    • https://static.usrfiles.com/ugd/078c79_fe3a65b0def04afb812b89124892a229.pdf
    • https://static.usrfiles.com/ugd/defcb2_1038e93d8e2d478a9894a5c54cd06162.pdf
    • https://static.usrfiles.com/ugd/28146e_5134cba360704d17a35bfe7ebd2ba429.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_off000070fb.bin
a2e187d3efcf3e58566bc4eb922a7635b0f897a1805669f9ea09493fac4423ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 4808 bytes
font_01_sfnt_off00008154.bin
f1ffd166432df4d2c9414d91cc6831dc5690b3a9080f95214179885dcb35e346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 10536 bytes
font_02_sfnt_off0000a599.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA599 16092 bytes
font_03_sfnt_off0000ba61.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA61 4324 bytes

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