Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89e1c4bb44ce484…

MALICIOUS

PDF

31.8 KB Authoring application: Soda PDF
MD5: f4f756f1b3773699e50f493af3fe367d SHA-1: 703430c128f9b9469646d1221dbcea73f7dbf5dd SHA-256: c89e1c4bb44ce48478fd949ea8ee114d18e145acb18bc4989cd055d03139eff9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning and phishing lures. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. The embedded URLs are likely part of a campaign to redirect users to malicious content or further phishing pages.

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://mymoneybuilder.org/uploads/1/3/0/2/130287269/sajive.pdf
    • http://sourcesounding.com/uploads/1/3/0/3/130313093/dujimali.pdf
    • http://4550-experience.com/uploads/1/3/0/6/130605217/7207648.pdf
    • http://naturalandpermanentbodyadornment.com/uploads/1/3/0/6/130604602/e5959d305427f.pdf
    • http://101redirect.com/uploads/1/3/0/4/130483260/lojof.pdf
    • http://mig-computer.org/uploads/1/3/0/6/130604804/juxepikavosufafa.pdf
    • http://cathygambino.net/uploads/1/3/0/6/130620379/vefumibotam.pdf
    • http://delphifm.com/uploads/1/3/0/4/130436079/vuguwagu.pdf
    • http://nihao.limited/uploads/1/3/0/5/130544672/dfb6581944f.pdf
    • http://happyrecipebox.com/uploads/1/3/0/5/130589366/ee9b8c2f4d.pdf
    • https://tegalelo.weebly.com/uploads/1/3/0/3/130323914/bifuxufijawoma.pdf
    • http://tackylightstoursrichmondvarva.us/uploads/1/3/0/2/130291975/130291975.html#descriptive+accounting+21st+edition

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001272.bin
fdaf8cf0490170f40106f9a25bcfc67509ead4b378ea292018b422176f38e463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1272 7848 bytes

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