Malicious PDF — malware analysis report

Static analysis result for SHA-256 b463ff3fdf5a456f…

MALICIOUS

PDF

44.2 KB Created: 2020-09-02 00:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83cd2d1a09f49b1ed289bae6651ad103 SHA-1: 851c70d41c98103073f2c34ed522c4c98d0153d4 SHA-256: b463ff3fdf5a456f79768d84e3bb4939fe5bf03729110533f8a2da427b195829
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.ru/wix?keyword=classroom+games+for+teaching+english+pdf points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. 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.ru/wix?keyword=classroom+games+for+teaching+english+pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/grass_cutting_robot_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/98439083676.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/fedonufudewo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4799/0934/files/nekizinakegoduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/xupasezit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/nomijiwidemikutaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/nalubori.pdf
    • https://static.usrfiles.com/ugd/c836c3_5d9fc38beff0495da4997f0d9a9a454e.pdf
    • https://static.usrfiles.com/ugd/d1d005_f083ec6281f34c9fbd15a5a010ad6151.pdf
    • https://static.usrfiles.com/ugd/493135_d4260c01ac1f40719732da5451ed395e.pdf
    • https://static.usrfiles.com/ugd/6812d7_9df6456584094a8aa7e58dbd61aac651.pdf
    • https://static.usrfiles.com/ugd/909b15_ad338a92827743a494e7aed9d7fa4152.pdf
    • https://static.usrfiles.com/ugd/36f25b_71dce12f15114b6690505bc51e4b3bbb.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_off00006e8d.bin
831a735e6c3ccd8889aef1178cff74be99c57cad9d2a33ba94c86ecd966dc21d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 5476 bytes
font_01_sfnt_off000080fb.bin
3cf0de25c1c77a6662240eee9c94673fa926d0a8dd793f6c0f0b1ca355dd1ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FB 10272 bytes

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