Malicious PDF — malware analysis report

Static analysis result for SHA-256 f909c2a9df9963e6…

MALICIOUS

PDF

35.8 KB Created: 2020-09-02 20:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78ad7dff56a890bd45a62af97efeecbb SHA-1: 9811af331dccf640469257ccf033631c59ec69fd SHA-256: f909c2a9df9963e69ba16d468ed2b5fb21360e55233a8b0e34ea9031707a5ec5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links, 'https://ttraff.club/wix?keyword=exponential+and+logarithmic+function+worksheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to trick users into visiting this malicious site under the guise of an educational worksheet.

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.club/wix?keyword=exponential+and+logarithmic+function+worksheet
    • https://cdn.shopify.com/s/files/1/0434/2654/5820/files/zeseratikupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/gukenarukukenivorod.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/38228514490.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/32014206078.pdf
    • https://static.usrfiles.com/ugd/83b1b3_2dbf04e89a4544f0b40d9276e70e7499.pdf
    • https://static.usrfiles.com/ugd/0adedf_372ebd68ca254bfda15600291b8c5fc1.pdf
    • https://static.usrfiles.com/ugd/c836c3_b03fb66872704f379ad6c1e9935549de.pdf
    • https://static.usrfiles.com/ugd/8b2c09_c73fbfe6e7984aa4aabf783fb5ac40ca.pdf
    • https://static.usrfiles.com/ugd/aec2ea_5e08fa0b8dc644949d62d0917aa54f7e.pdf
    • https://static.usrfiles.com/ugd/764aaa_34c82a47a7c548069595000638b739e7.pdf
    • https://static.usrfiles.com/ugd/89363e_921bb16342ba449baec9247c7e9486b2.pdf
    • https://static.usrfiles.com/ugd/1f5cef_777a3edc8a0440909e4b0aff3060a8ae.pdf
    • https://static.usrfiles.com/ugd/3de8a6_6c017459530f4561946213397f534ec1.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_off00004fe3.bin
4796d4fa221c21a0b6a85ee94c5b5feb145e7c2142ed9155134253669a064c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE3 5752 bytes
font_01_sfnt_off0000636f.bin
d0087f754b763a50a790397ac58499bb7335b7c55e9cd1ffdf87c7b3a5519673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 9040 bytes

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