Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a1cc480525a616…

MALICIOUS

PDF

31.7 KB Created: 2020-08-31 00:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 711949fada0e4ccd17c5f45ccfd2cff6 SHA-1: 72145080dadee661569dacc466ffbbfc5b602058 SHA-256: 37a1cc480525a6168fcb2272bf7594359217ffc9a8c00fbd1535de61d991f8a2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body contains obfuscated text and the URL 'https://ttraff.com/wix?keyword=koo+za+rot+zab', suggesting a lure to a malicious site. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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=koo+za+rot+zab
    • https://static.usrfiles.com/ugd/b8c837_0abcaceee78f4e7dbff6621253b4b752.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d97ab57f0a47c9ab6851cf43d13cac.pdf
    • https://static.usrfiles.com/ugd/b8c837_09afb7bc9c834125bc5547bdd4df0aea.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/resufelegijomu.pdf
    • https://cdn.shopify.com/s/files/1/0459/7334/0320/files/frases_felices_fiestas_cortas.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/fiddlesticks_support_guide_s9.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/89719925788.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf741a8d945f49c5a699f7df45f2abdf.pdf
    • https://static.usrfiles.com/ugd/696b8a_3caebffb9e584f97a23cfe1fc23126ae.pdf
    • https://static.usrfiles.com/ugd/6260fe_907a0e0724694b3890def4ba308acc49.pdf
    • https://static.usrfiles.com/ugd/b8c837_3afd7d5d8d3d48d780e46f3371c6f3cd.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_off000041be.bin
9ed08ea0dbfc1a818a5949f4492c6e47d9531c5e6bc47debe9a37bd461c99f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41BE 4628 bytes
font_01_sfnt_off00005197.bin
bd1f79e1f68564ac997014f8dbda7d5d7a98088023aa55e714c3c91c95bf94d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5197 9860 bytes

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