Malicious PDF — malware analysis report

Static analysis result for SHA-256 3534e869d485dbba…

MALICIOUS

PDF

45.1 KB Authoring application: Scribus
MD5: 365327f6db74c77ec44b77938cda715a SHA-1: c7d0715dd7b6fd3cf3bd1cf66307d7002a11e06a SHA-256: 3534e869d485dbbabebe068a7dea4baa90617a00c6fdbd8250c4502ff0a13cc4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of external links. The document body, though partially obfuscated, contains text related to creating a blog, likely a lure. The embedded URLs point to various PDF files hosted on different domains, suggesting a campaign focused on distributing malicious content or phishing through link farms. ClamAV also detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://thegullywhompers.com/uploads/1/3/0/6/130620367/ca5277cdcdf.pdf
    • http://salesale.space/uploads/1/3/0/3/130323743/6404690.pdf
    • http://123-bonus.site/uploads/1/3/0/3/130313057/8700ae6.pdf
    • http://rew.pkz-zavod.ru/uploads/2020/01/28/jajumowapefodola.pdf
    • http://sublimepainting.net/uploads/1/3/0/2/130289703/8507115.pdf
    • http://barbarajtorreyart.com/uploads/1/3/0/4/130483373/pifavewukonel.pdf
    • http://mrsmalloy.com/uploads/1/3/0/2/130287957/130287957.html#cara+buat+blog+di+google+lewat+android

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001102.bin
a77e3211a37510141042ea926d61b9782fa38f65d5270a22281dd7e5a069950c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1102 8820 bytes
font_01_sfnt_off00006ac4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC4 16036 bytes

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