Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0fd8b2ac6f9097…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 23:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db09ee6fdf6ee3fe4b12c254e3b54ef SHA-1: 4b1720f84a34e090fc1a73b1ed2db87196beed81 SHA-256: 8d0fd8b2ac6f9097759a8341e93de459c07882dcfdc7118b8df835a6d00a69d8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is a common technique for delivering malware or phishing pages. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=math+facts+worksheets+2nd+grade+pdf', indicating a lure to click on a link. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination. The primary malicious URL is ttraff.cc, which is flagged as a 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.cc/pify?keyword=math+facts+worksheets+2nd+grade+pdf
    • http://rakawuw.cim-co.com/uploads/1/3/0/7/130739640/6689196.pdf
    • http://files.slfexhibition.com/uploads/1/3/2/6/132696512/4f492be8c.pdf
    • http://files.foiaprofessionalservices.com/uploads/1/3/0/9/130969036/724894.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/51267427158.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/47608395652.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/pirates_of_the_caribbean_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0440/3508/0342/files/vebafeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/bafetuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/barriers_to_communication.pdf
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/wafulosejodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/60228994349.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/84770928572.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.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_off00006603.bin
01a0ebce690fbd1823a1c49da7ed179259811296424927651cddf028a7b3ea92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 5680 bytes
font_01_sfnt_off00007971.bin
a3b1e85af96710f1d4cc7c6bb2360c923a21c011d80823c00ba8081946b93633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 9948 bytes

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