Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78276765e3a2a75…

MALICIOUS

PDF

36.7 KB Created: 2020-09-06 03:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf6b32ec30221b952602a8f7c9d5523d SHA-1: dea3a01808379a8ac366344c5301d756744a168b SHA-256: f78276765e3a2a75e948437abb2432ba1c80661e61f9bbe3df7f92d9d242b7dd
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '2cellos thunderstruck sheet music' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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.me/wix?keyword=2cellos+thunderstruck+sheet+music
    • https://cdn.shopify.com/s/files/1/0435/4614/9023/files/52199165080.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/kezora.pdf
    • https://cdn.shopify.com/s/files/1/0441/2679/7976/files/48499167738.pdf
    • https://static.usrfiles.com/ugd/041b56_0b7631e0ce354adeacfa39dd8bf33238.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_058e71b8cf304d4697a3a3366def1ddd.pdf
    • https://static.usrfiles.com/ugd/d8966e_3611073d195b4ea99038aef3312d6826.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_c2deac0015174d09ad7b330a48532f5c.pdf
    • https://static.usrfiles.com/ugd/e2b09b_04aa3966577c46efbbdf8cb9f4412e03.pdf
    • https://static.usrfiles.com/ugd/8c0e65_81a39563c98043f79a5dee5866ddfa0d.pdf
    • https://static.usrfiles.com/ugd/23924c_4b7be17b39c849ac86e2a6e171224b43.pdf
    • https://static.usrfiles.com/ugd/27135d_81ae6ac9254d4e82b9db141446713c2c.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_off0000482b.bin
05f40d9406da1fbce5ee16a430e8ce0f2e0252631f74493f0de430c751d44b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482B 5072 bytes
font_01_sfnt_off0000593e.bin
f1a4e6914f5bcb5562cff58ea2af09e6928f3ab9160137f985adad8e0094305d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 14564 bytes

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