Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce99c51925121cca…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 07:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06cceff9bbcbf6976d551a74436e2db4 SHA-1: 1cf67c85d7d31613a8d48e2ea439c747d443b425 SHA-256: ce99c51925121cca5bda8aea8bfca4a98f44690113c5297931763ef2a3c0a912
150 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'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=adezyon+kohezyon+y%25C3%25BCzey+gerilimi+k%25C4%25B1lcall%25C4%25B1k
    • https://cdn.shopify.com/s/files/1/0438/8660/8552/files/livro_infantil_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/kujosiwosozefavagaxumigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/pozebawakuves.pdf
    • https://static.usrfiles.com/ugd/4725f1_e3b670dbad3a44de892d7411362a689e.pdf
    • https://static.usrfiles.com/ugd/b8c837_077e278c17bf4e66a40d68766f480c64.pdf
    • https://static.usrfiles.com/ugd/5a1791_ef9fbf9557e94879b4a4d2a5e9aed28f.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_aaf37a4b20c341e0ae01b8e047d84f4b.pdf
    • https://cdn.shopify.com/s/files/1/0433/8057/2321/files/zoo_animals_clipart.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/gozuretilawixaruvovuxajor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/94145738764.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_off00005489.bin
b934ffc28a66f164564afa3cc88a1c31e766c55e015522b1178fa91b65726b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 5532 bytes
font_01_sfnt_off00006700.bin
0644cfd6d798f6ebe49daeeb4d41a70eecbbac25438bb9a06c69e86618463afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 12888 bytes

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