Malicious PDF — malware analysis report

Static analysis result for SHA-256 348b35f9c7fcac6d…

MALICIOUS

PDF

52.9 KB Created: 2020-08-29 16:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f11ac6ceffce18dc579c25aa0fceb52 SHA-1: 6a8acf8d676f820cd74d9e0bfa00795793a832c5 SHA-256: 348b35f9c7fcac6d13450a1454ff0e7751781b82a1d9b156c2a5dd67a8457ca8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. This link, 'https://ttraff.ru/wix?keyword=montessori+preschool+curriculum', is likely the primary mechanism for delivering a malicious payload or directing users to a phishing page. The document also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains, suggesting an attempt to obscure the malicious destination or leverage legitimate platforms for distribution.

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=montessori+preschool+curriculum
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/32128767193.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/kufedexulisija.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/zoxumazot.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/wefutune.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/evaluation_emc_6eme_devenir_collegie.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad6d2c485c094095bf5fe1d150aad627.pdf
    • https://static.usrfiles.com/ugd/19103d_662b3deb581c48c586a1c976c3fbe7fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_928557fc88504efd843ea792ab26c7a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef9bff7715084d1098bf4381f9438443.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/dell_supportassist_uninstall.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/rogojedagusuw.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_off000092d0.bin
4def37fd55992e67d5bc19b2d684fb049861994c91c4c13239c2a04a777e9447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D0 4968 bytes
font_01_sfnt_off0000a397.bin
f5c7c95d54eaa86c7d51af530695d7a5a792f628e1c4468fde72fbbff35fbe3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 10304 bytes

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