Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d9ddd5a4e9eaa6…

MALICIOUS

PDF

39.9 KB Authoring application: LibreOffice Draw
MD5: 96d13cbd59ed354571cff44f9d8a1ecf SHA-1: 4c91bc736c0b3bf1cb9ba988e0d4ad25dfc99d2b SHA-256: b3d9ddd5a4e9eaa6197c694b31cb83b34d11ab77cf9e83f1eb438c5eed3f852b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. This indicates a phishing or malicious content distribution attempt. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports this, classifying it as a phishing-related PDF. The ML classifier also strongly flagged this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://thevillagemiami.com/uploads/1/3/0/5/130589460/d05594718b031ea.pdf
    • http://premedpursuit.com/uploads/1/3/0/5/130542935/vudorusad_gamazopuzekul_jefex.pdf
    • http://motioninvestmentltd.com/uploads/1/3/0/4/130488839/lejejuwinu_jimixa_xirawosozaxapa_nimasisunijes.pdf
    • http://endoscopecabinet.com/uploads/1/3/0/6/130604795/e90b84ee5b3.pdf
    • http://jamesmcleodvoice.com/uploads/1/3/0/6/130639839/4550815.pdf
    • http://ambientringtones.com/uploads/1/3/0/7/130776575/fizaxutimixule.pdf
    • http://projectresource.us/uploads/1/3/0/6/130604201/lunufudonil.pdf
    • http://wilbrahamantiques.com/uploads/1/3/0/8/130874671/gumiselupub_detenisovutiz_jupomub_najanerav.pdf
    • http://nancyrichy.com/uploads/1/3/0/7/130775370/4371615.pdf
    • http://www.nanaslittleworld.com/uploads/1/3/0/9/130969838/9908674.pdf
    • http://newportsummerrentals.com/uploads/1/3/0/5/130590564/tirilaguz-nuremutakegub.pdf
    • http://webmail.susanbourdet.com/uploads/1/3/0/5/130551477/c20a1a7a1.pdf
    • http://suntidetravels.xsideas.com/uploads/1/3/0/8/130873846/130873846.html#how+to+put+3+pdfs+into+one+document
    • http://premedpursuit.com/uploads/1/3/0/5/130542935/vudorusad_gamazopuzekul_j

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000429c.bin
c90327869f385ccd8fa38a798848f93caec0200b02a993b9db388ee73d83a9e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x429C 8384 bytes

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