Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c94dd40b6f8d7ca…

MALICIOUS

PDF

44.4 KB Created: 2020-08-03 22:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4779d513841919a6d0889804f7d8580e SHA-1: 13e8d6b6e4b82e864d8c8324e6f4ea5c9c6fb2f7 SHA-256: 9c94dd40b6f8d7cad163c212c81a5464f005288389383baa8e2feeb458cdf929
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link identified by the heuristic. This suggests the primary purpose is to redirect users to malicious content, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=chemistry+concepts+and+applications+textbook+pdf
    • http://files.cahabariverdesigns.com/uploads/1/3/0/7/130739463/6217805.pdf
    • http://files.morefitstudio.com/uploads/1/3/0/7/130775750/5887471.pdf
    • http://files.teenconcussion.com/uploads/1/3/0/9/130969140/kinenupere_bigewoz_jesafifavum.pdf
    • http://fijidivo.scott-foxpuppypreschool.com/uploads/1/3/0/8/130874474/muxosekuxus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/zurujikozekigisid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/7417468956.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/61978478555.pdf
    • https://cdn.shopify.com/s/files/1/0440/2305/4501/files/hukum_utilitarianisme.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8776/files/xikafumujuvipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/92582282617.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/tirura.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/19938644407.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/10762549498.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/kutugi.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_off00006aed.bin
0486f32d8459c81f4c8d383c6467ddfcd12e198380f76c8e966411712b563d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AED 5672 bytes
font_01_sfnt_off00007e0d.bin
a1db0cbc9091ef5d976f3cf422c5bc7d6d0cc9136b67aa2c29de5ddaa3e4e17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0D 10728 bytes

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