Malicious PDF — malware analysis report

Static analysis result for SHA-256 8475432d9fbab643…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 23:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88440d0d96cd4e1baa760a41631987ec SHA-1: de661cf438ded3ae80ac514a9e239c300ac1ca39 SHA-256: 8475432d9fbab643c018c927ee023236eafdf853cb80cfb663c972397b0deee8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a link to a known malicious redirector, indicating a phishing or social engineering attempt. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, suggesting it was programmatically created to host links. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm or SEO poisoning tactic to distribute the malicious URL.

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=risk+game+of+thrones+regles
    • https://static.usrfiles.com/ugd/516793_417559c9e8614a2f8fb6e8aafbebd7ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_28410656406e4946852adc44fe522506.pdf
    • https://static.usrfiles.com/ugd/f4de5e_9009543fe2fa419e80b744d0445ebd51.pdf
    • https://static.usrfiles.com/ugd/affaa6_f68fc79f850b4c028fafc137b2cb7b04.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/45551829413.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/levuxunosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/vomikomijigamar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/31159427084.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/4890048912.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/74214070335.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6419/files/teregebaganud.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/88502284019.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_off000060e3.bin
b87421042c2fec2c46d128122ca848382b1df1a8c87bd182522c4c515a643743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 5252 bytes
font_01_sfnt_off000072a2.bin
7b1e34cbeaf42879e50567c4f75706a8205a14533120e909fe6f77ac46e19b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 10120 bytes

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