Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23abec537111260…

MALICIOUS

PDF

40.2 KB Created: 2020-08-21 03:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 775e5843228a8aad6d6edc8cf5982f6d SHA-1: 956ce8e29f52b37233dcf6e555df7b82cf9f50d0 SHA-256: b23abec53711126004e804835d46b4d82e98add0806a301a37251bd82a0323a9
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.com, disguised with a lure of 'weather worksheets for kindergarten printable'. This indicates a social engineering tactic to trick users into visiting a potentially harmful site. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility of the malicious redirector.

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.com/pify?keyword=weather+worksheets+for+kindergarten+printable
    • http://files.pennyfarthingshop.com/uploads/1/3/1/3/131383934/c62f7d67.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/35474507900.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/rafal.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/5836544302.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/metro_rio_de_janeiro_mapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1099/5862/files/adobe_printer_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/corrugated_roofing_sheets_green.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/53531785786.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/poderuzevutavetakonalo.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_off00005d9d.bin
8f3ffb012b38eefc2ea38a1da3f5bbce489d4d35abb2334694bca46e37aa88de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9D 5612 bytes
font_01_sfnt_off000070c3.bin
eb0ccac626bd46e4a2230916088ab61e5d6d43eec087aaf63afb21bc783a7781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 10432 bytes

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