Malicious PDF — malware analysis report

Static analysis result for SHA-256 2502755f3cd4981f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 13:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 511bf724330abc79e16b98c8a1f2ce2a SHA-1: e9a243cf2f25c19a10c47aa312ccce01d272a7ba SHA-256: 2502755f3cd4981ffb43798541db78aa4a134eaa6c31d671f75b74a8ae4ba5f0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to manipulate search results or distribute content. The primary malicious URL identified is https://ttraff.cc/wix?keyword=sois+mestre+ma%25C3%25A7om+resposta. The document body contains garbled text but also includes the malicious URL and several benign Shopify URLs, consistent with a link farm strategy.

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=sois+mestre+ma%25C3%25A7om+resposta
    • https://cdn.shopify.com/s/files/1/0431/2242/6013/files/elex_starting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/gunifiduvobedoxag.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/47803460254.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/verozegexiwadinoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/74350811536.pdf
    • https://cdn.shopify.com/s/files/1/0441/1647/6056/files/lalan.pdf
    • https://static.usrfiles.com/ugd/4dd980_1ab024e5dc2744e6a094ff60a95a441e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2922f2e2c864870b739e3a005f8cb08.pdf
    • https://static.usrfiles.com/ugd/0df15e_2ef793a0d8fc4e4393dcbf4a2e2f96ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e91c8ffad224240b9b6ae6b2fc36491.pdf
    • https://static.usrfiles.com/ugd/8d57bd_e4c39a7f7de947498919ecc3cb52572f.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/parubogosolononases.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/renepugapedobadusidavol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/boy_in_the_striped_pajamas_summary.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/15403413791.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_off0000624d.bin
ab4e5a5f1cc9e7b38bc3657343eb0291104b194c3bede36f2e33abf2399bfe8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5220 bytes
font_01_sfnt_off000073f4.bin
f88d02bc160a0653b7c40af90a51fb3d11f19047ef78143c279a05db737dfc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 12272 bytes

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