Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfdc402b5e233eee…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 03:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9973b4f1d3d4743b4dad986baa8992c1 SHA-1: 0cf32b139cc7fc74472a1f02631b1e9644f03567 SHA-256: cfdc402b5e233eeedcb9854d7a526e4fa9fd28de315fa53d89957df01bf2e676
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=tropical+rainforest+banana+tree'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier also flagged this PDF with high confidence.

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=tropical+rainforest+banana+tree
    • https://static.usrfiles.com/ugd/05900a_be37868b6afa4dcbbdb733bdeb67d2de.pdf
    • https://static.usrfiles.com/ugd/b7306e_7797de002fbb4b3a8329ac68d542c15c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c817e777ffad4352919e13822e8f704a.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_4ae87051f3144f3d8cf2431843dff8ab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/mutaveripatud.pdf
    • https://static.usrfiles.com/ugd/824332_43fe9299dd6441a7a36a63770051d2c7.pdf
    • https://static.usrfiles.com/ugd/538d67_cdbcead0aa6c4940963892d26772d0ee.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f198ce42f4ed4e65a09f34863684b1e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b832b9a38e744de4ad2ae6d6bb618ed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5453d015b399436893caff5cc32ab263.pdf
    • https://static.usrfiles.com/ugd/b8c837_59de6ac12912479a83686689179d656e.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_off000062c3.bin
b52561ef4f30c2893b2b19a160fb6c4aba1ee346773eed4a966f877e6843822d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 5100 bytes
font_01_sfnt_off0000741e.bin
ab003f82bfc1ea86e6a702bb132968682a5e13208b282ba752cd285b5aa161bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741E 10028 bytes

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