Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5d51d047fefd4b…

MALICIOUS

PDF

52.4 KB Created: 2020-08-31 21:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52563b91c86978e8e8e9cd4eb9b1dd6a SHA-1: 5f6b4bf0dae85a32c92a2ae7d503a26a8e8b370d SHA-256: 4c5d51d047fefd4b861740db6ff152c35a8fa3fe02ea9daad873acdebd5afa17
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body itself contains a reference to 'beach buggy racing 2 mod apk rexdl' and a URL that appears to be part of the lure. The presence of a link farm heuristic further suggests this is designed for SEO poisoning or to distribute malware via seemingly legitimate links.

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.com/wix?keyword=beach+buggy+racing+2+mod+apk+rexdl
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/54966959347.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/descargar_libro_after_2_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/70147343458.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/vujixifasuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/algebraic_expressions_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/30469009747.pdf
    • https://cdn.shopify.com/s/files/1/0459/1216/2453/files/devamuvoda.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/14590711768.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3415/files/docstring_format_python_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/boris_y_el_ajolote_albino.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lotumasajifakizatume.pdf
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/81951104933.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/audacity_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/machinerys_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/vodivuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/nunitenetixibug.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_off000069e5.bin
6d9901e2dff8d346b1ae81c00b829f3a9afdcf005cca60ac57c93c0b9f08ddd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 5668 bytes
font_01_sfnt_off00007cf3.bin
b6f6a8ffffd8cf290d6e6111b73e526a5e85104649ff0add39c1fcf5ab4e1b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 10536 bytes
font_02_sfnt_off0000a14a.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14A 16092 bytes
font_03_sfnt_off0000b611.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB611 4324 bytes

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