Malicious PDF — malware analysis report

Static analysis result for SHA-256 562e7cfe8a959996…

MALICIOUS

PDF

33.0 KB Created: 2020-09-04 03:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be439efc7574d8eb588c98ae0607a05a SHA-1: 91bd98e3c1b127d37c54931a0474e57745f7984b SHA-256: 562e7cfe8a9599965429075662fc721b72207f7442021f714b9650cef7530132
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for users interested in physics reports. The presence of numerous external PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the primary malicious activity observed is the redirection to a harmful URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=chief+examiners+report+physics
    • https://static.usrfiles.com/ugd/b8c837_e5c6e364a7c6432a8407218a8b7165ab.pdf
    • https://static.usrfiles.com/ugd/35e1ce_0bd6248721d54840a2e518c1368d58d9.pdf
    • https://static.usrfiles.com/ugd/80bfa9_ad5820ebed574236b26b31b5d7cb6f7a.pdf
    • https://static.usrfiles.com/ugd/934fc3_467be0073e864e20959a4b3f9770541f.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/types_of_terrestrial_biomes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/third_generation_cephalosporins.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7461/files/69344998092.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/ken_kollman_the_american_political_system.pdf
    • https://static.usrfiles.com/ugd/b8c837_cee671552ef741289eafb298edd3806e.pdf
    • https://static.usrfiles.com/ugd/4bb894_5eaae971963d45708184cc6da8a0fcf6.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/veget.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/pubg_server_status.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/87466136455.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_off000044fd.bin
a60cab39ccba9e142bbf57eb3c1320fbc76a02716088c1a1c006351599bdfa10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44FD 5296 bytes
font_01_sfnt_off000056e5.bin
49e207d134a6c2d4b0ea528db022c79c945bf9c3946a7f102f5e5a14c7f1644b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E5 9536 bytes

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