Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b10a0256bbeb125…

MALICIOUS

PDF

36.0 KB Created: 2020-08-04 13:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43cb5c248d82cd3c257d94452002ea2f SHA-1: e9182db81ff896bf39500dcbf93c8cc0fb17291f SHA-256: 1b10a0256bbeb125d08a8809f34ab74f6751f3fc148c6310347457df4c47f285
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary intent appears to be redirecting users to malicious infrastructure under the guise of providing an academic document.

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=applied+mathematics+1+pdf+mumbai+university
    • http://files.reillycyclingtours.com/uploads/1/3/1/1/131164573/d22301df2b285.pdf
    • http://files.teachitalian.co.uk/uploads/1/3/1/6/131607093/7748500.pdf
    • http://files.andreaengland.net/uploads/1/3/1/8/131871740/jurovok.pdf
    • http://files.unad.agency/uploads/1/3/1/8/131871424/1475447.pdf
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/tavojizibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/outlook_allergan_webmail.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/66513034341.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/81880117663.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/safe_use_of_pesticides.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/avd_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/55688257688.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/how_to_program_cox_remote_to_tv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/xusaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/97699199755.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_off00004d98.bin
364fd45a90c4c486bb8566b663b58585a2b0edd8aa019437051c2504810e0980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D98 5740 bytes
font_01_sfnt_off000060ff.bin
34a4528949761d0356f58caa9960da700f0f444f1ea823bfc0a4ddd0fe0345df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 9896 bytes

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