Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb71239788b26197…

MALICIOUS

PDF

56.6 KB Created: 2020-08-06 14:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b30a681e2a537a39b6e19cd36dffa59 SHA-1: 0fea8504042b3a4e02acaf262308f8f269873d68 SHA-256: cb71239788b26197c87332ba317c4c8c0720bec6bcf998e7d645dfe9d675aed1
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=classification+non+alcoholic+beverages+pdf'. Another critical heuristic indicates this is a link farm, with many links pointing to Shopify domains, likely to obscure the malicious intent. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic strongly suggest a phishing or redirection attack.

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/pify?keyword=classification+non+alcoholic+beverages+pdf
    • http://files.maocorrea.com/uploads/1/3/0/9/130969744/wegaxo.pdf
    • http://files.colburnart.ca/uploads/1/3/0/7/130739646/nakevusojum.pdf
    • http://files.eunsookim.com/uploads/1/3/2/6/132695288/14c51.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/rilenapudipexibotosexat.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/60779306861.pdf
    • https://cdn.shopify.com/s/files/1/0449/5425/5515/files/flo_rida_mail_on_sunday.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/gukivexijoxuwupisipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/53795752742.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/minecraft_pe_0._14_0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/ramuxigimej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/tipadobojobetavevavin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/77397710484.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1577/files/avery_5960_template.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_off00009f9e.bin
3a2798d385239626299e58930d95922c9d71b102f808a05ccd0d848e7ec5db23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9E 5520 bytes
font_01_sfnt_off0000b25a.bin
f33d62e68e86f39a3a698de98a0fbfa7db85829d5560a174182d8b9e97938774		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25A 10304 bytes

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