Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdc81d59ad32ee9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 02:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8d2527a68f5962bf701702cc346f82 SHA-1: 73a4fdfb03a576926085454bc89d0882e41b46c2 SHA-256: 4cdc81d59ad32ee9d317dc12a2247e9cb32a1bff830654c8ab32f24df4cee022
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=tipos+de+escuelas+de+administracion'. This URL is likely used to redirect the user to a malicious site. The document also contains a link farm heuristic, indicating a large number of external links, further supporting the malicious intent of directing users to external resources. The presence of the malicious redirector URL is the primary indicator of malicious activity.

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=tipos+de+escuelas+de+administracion
    • https://static.usrfiles.com/ugd/8c2aca_8ccf878696654c2fbdf71f3c1b3a436c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b139f2e832534566ba572c359f306460.pdf
    • https://static.usrfiles.com/ugd/b8c837_23b49f4d1d194ea6ab94de09e6916209.pdf
    • https://static.usrfiles.com/ugd/432b07_e1c0d65b6ba746eeaf060b8dec0d6a53.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/79880899844.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/roxuno.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7766977706946cdbdfdda9685ee254a.pdf
    • https://static.usrfiles.com/ugd/33ab24_c0c9d47e692c4660b08658f427f7d2f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a1da7199a44c059a1aa85f7bc1cda8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5e8d0f10240461e9b98d1a2b99c762d.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b3d5b5938c44d1b04ac96dc5199399.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/
    • https://static.usrfiles.com/ugd/b8c837_e2a1da7199a44c

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac1.bin
2fd89f695bccf37db6afd4609a05531cb0659554b8b9d86e9c3b2965b2a25192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC1 5168 bytes
font_01_sfnt_off00007c34.bin
df280e86e0912b144d3cfc8825f5a4a457f1ad8a14060b3e2c29d48235f15e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 11396 bytes

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