Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40a64de90ceae2e…

MALICIOUS

PDF

52.6 KB Created: 2020-09-10 21:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48d5f7cb0ad39bb50ba76069e9123d5f SHA-1: 66452012ccecaab9cdb7763206921b531bd3416a SHA-256: b40a64de90ceae2e0c45a998115baabb79f80d413ae3efe1f8b23942e09c11cf
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically 'https://ttraff.me/wix?keyword=congo+mapping+report'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF links, suggesting a lure to trick users into clicking the malicious URL. No scripts were extracted from this sample.

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.me/wix?keyword=congo+mapping+report
    • https://static.usrfiles.com/ugd/c268f7_02606884b3e04a0b9b91ea8c9f3c2877.pdf
    • https://static.usrfiles.com/ugd/a467d2_4e5483e0592644ffa2df49fe878d5a2f.pdf
    • https://static.usrfiles.com/ugd/6cf392_b5051cda2a0749db90a2d92c240e0aee.pdf
    • https://static.usrfiles.com/ugd/4c4e45_b29b6b8ef30b4940bfca4f901ba447a8.pdf
    • https://cdn.shopify.com/s/files/1/0463/0698/4098/files/corporate_magazine_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0418/files/88614960543.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/dulce_maria_loynaz_poemas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6306/6270/files/72738221920.pdf
    • https://static.usrfiles.com/ugd/9ef1ea_365cc3e0d8b04849b18538c3ed17e7ca.pdf
    • https://static.usrfiles.com/ugd/76dd3d_96365993e18b4634ab00a4751fee2e68.pdf
    • https://cdn.shopify.com/s/files/1/0430/7694/4021/files/19380213601.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/vexijifuzekoneg.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/borland_c_ide_free.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_off00009265.bin
3050d095755901024a731570bbc4ec5d805302cd69dbf58c9b650d8323d603ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9265 4836 bytes
font_01_sfnt_off0000a2bc.bin
d48bbca271a6c360033f020a02e1a211f9a1cd16fc9afad01240ef5acba7be24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 10304 bytes

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