Malicious PDF — malware analysis report

Static analysis result for SHA-256 440f2b9769dac5ea…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 06:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67a226dd1086bfcb94cef7ad2025eba3 SHA-1: ebdae7aea383a8379aca5373b3ab1aba2674550c SHA-256: 440f2b9769dac5eaef2389ea8843d2f8b11b10b3d04cef24ca5db9ebc5bf160d
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as a resource for 'best essential oil books 2018'. One of these links, https://ttraff.cc/wix?keyword=best+essential+oil+books+2018, redirects to known malicious infrastructure. The document body is heavily obfuscated but contains the malicious URL and several benign Shopify URLs, likely to lend credibility. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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=best+essential+oil+books+2018
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/supplementary_and_congruent_angles_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/76278223327.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/juriz.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d791ac1433d47b5ae15dd4042e1d47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c452ab1d71f54381abc52f0acead2ad0.pdf
    • https://static.usrfiles.com/ugd/b8c837_679b4b7a431147a9a48470619d191e10.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c8db09b874642879def5dcbfd0058e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a34f25398c34df9b1a99cc4e235aec6.pdf
    • https://static.usrfiles.com/ugd/b8c837_62a5d968ecc846639d3de5cc1a6faf2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_47248dd6f0a14672b265e6081293c3cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09e7c95316f4fa48aca75a811768719.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/savage_11_vt_stocks.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/nokobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/verb_form_of_choose.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_off00006302.bin
33d975b90956596e0cfa04c03568c307559e0e27ce8adf7a1d928db758de1e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5356 bytes
font_01_sfnt_off0000754c.bin
d819312a45ac34199af3321f4f259c443b26c71b8d4490e2ee9bc85370d168c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 10372 bytes

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