Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5f960f5aa2fa07…

MALICIOUS

PDF

33.3 KB Authoring application: Poppler-utils
MD5: 5aaa529c631589d96ccbe960cf0f8ad6 SHA-1: b47716080c1bb946d028f809b1339af706d9bdfa SHA-256: cb5f960f5aa2fa073b7ab7881f9f43cdcf46c1f216c6909e6e9620070d7d1fa6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests the document's primary purpose is to redirect users to other potentially malicious PDF files hosted on various domains. The ClamAV detection further supports its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs are the highest priority IOCs for further investigation.

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://ashleynixon.com/uploads/1/3/0/2/130272921/xekusozov.pdf
    • http://guildaware.net/uploads/1/3/0/3/130323421/6441077.pdf
    • http://661junkhauling.com/uploads/1/3/0/7/130740062/2a6c3915f99f.pdf
    • http://knowledgelord.com/uploads/1/3/0/5/130550665/6485912.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/4/130488530/130488530.html#harry+potter+theme+song+piano+simple+notes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001045.bin
4a6abfda1bb4b9f164c9418d6c2e81dfd98d86a19a6e5688994a37efb3bc8bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045 8436 bytes

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