Malicious PDF — malware analysis report

Static analysis result for SHA-256 523f7d157ab7cbdc…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 04:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4199bd9654e517be88d0097ef5760966 SHA-1: 36f3d714a3a09f4a9dade5c604ed92933341a181 SHA-256: 523f7d157ab7cbdc227905d1dea0073a8c2c76522e964ea4a73f75217b1c9b73
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF documents hosted on static.usrfiles.com. One of the primary links, ttraff.com, is flagged as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/wix?keyword=weight+watchers+how+does+activity+po
    • https://static.usrfiles.com/ugd/b444d4_72cd94c8c6bc41aaa3f5d03597484e0d.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_d9b7a541d12442e2b0d5470152e56bd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f31e5b92342443bbf0fd6b95516c983.pdf
    • https://static.usrfiles.com/ugd/b8c837_469bdc7996e2437d98cc89df968115a4.pdf
    • https://static.usrfiles.com/ugd/d5415a_9f945af4a9c34fbeb6941bfcfc97e77a.pdf
    • https://static.usrfiles.com/ugd/0047a4_1bc8dca3ac5348b691bc0829bc61aa73.pdf
    • https://static.usrfiles.com/ugd/10b11f_c4e81f48079d4af6b0d87681fe5c8691.pdf
    • https://cdn.shopify.com/s/files/1/0440/7010/9334/files/7750134117.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/temperature_sensing_devices.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/hotel_del_luna_sub_indo_bioskopkeren.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/57571122595.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/losupa.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_off000066e0.bin
2bebbe799abb128f7a343d28e8b11d59e20333850a35833d02cffaf34510ecc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 5568 bytes
font_01_sfnt_off000079ed.bin
1441a280e7ac9baa33f6249141b65c13b53418f850f7657cfb7005fe1f6eb662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79ED 10596 bytes

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