Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffff65d72c4cef1…

MALICIOUS

PDF

48.9 KB Authoring application: Solid Converter PDF
MD5: 0cda69f0e4a7f237eb1be3c27d2891bf SHA-1: a5cad6c6acf16c0ed0d174e98dc2c22303ad176b SHA-256: 9ffff65d72c4cef1ecfa93e3536a89ec57e01a403138fa4718a2027b8070c5f5
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body itself is heavily obfuscated and contains many of the same URLs, reinforcing the link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://petpalspetandhomecare.com/uploads/1/3/0/6/130639699/zunaxedusowoxun.pdf
    • http://nancyellenmiller.com/uploads/1/3/0/5/130588783/7361294.pdf
    • http://zupiw.slepttava.xyz/uploads/2020/01/29/wutidujupomu-xokaladarilupi-fikif.pdf
    • http://riwapad.xeuns.ru/uploads/2020/01/28/1616503.pdf
    • http://gasise.kazahstan-kepy.fun/uploads/2020/01/27/e0ddb330e99.pdf
    • http://zuwatibu.lifetime24.ru/uploads/2020/01/27/wijadoziva.pdf
    • http://inforsjeans.ru/uploads/2020/01/27/8845927.pdf
    • http://247marketingusa.com/uploads/1/3/0/3/130323222/5595959.pdf
    • http://morrisiennafarm.net/uploads/1/3/0/6/130639647/5652236.pdf
    • http://mgracetransitions.com/uploads/1/3/0/6/130639514/xawuno.pdf
    • http://zagov.nauticflclub.org/uploads/2020/01/27/4463357.pdf
    • http://redthreadtraveler.com/uploads/1/3/0/5/130551472/xavubeso_medanopufi_zirogidux_zatutexunika.pdf
    • http://nativitybloomingtonparish.org/uploads/1/3/0/5/130588786/9470d7919413.pdf
    • https://ginosakokonizu.weebly.com/uploads/1/3/0/4/130483407/9339434.pdf
    • http://stadiumcatering.com/uploads/1/3/0/4/130488934/vilisuvuso-wanubixoti.pdf
    • http://jamoran.horizon-geo.com/uploads/2020/01/28/fbfdb667f29657.pdf
    • http://colormeribbons.com/uploads/1/3/0/2/130289237/niten.pdf
    • http://900cahuenga.com/uploads/1/3/0/5/130590503/9951490.pdf
    • http://socialmediaflux.com/uploads/1/3/0/6/130604548/rorepi.pdf
    • http://adogsworld.be/uploads/1/3/0/6/130621114/rakomomapasanoved.pdf
    • http://taiguantravel.com/uploads/1/3/0/3/130323554/nezajuje-fimugeduzadita-zujarovuvu.pdf
    • http://xaxid.danielolivier.org/uploads/2020/01/28/dapojetezinidapu.pdf
    • http://nex.offerplus.xyz/uploads/2020/01/27/3892271.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/2/130289485/130289485.html#constitution+of+bosnia+and+herzegovina+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010a8.bin
831aad214afcc63f538f37ff1bc38d60437b836d7137153e251868df208262dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8 9296 bytes

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