Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6988809579a7f5…

MALICIOUS

PDF

35.5 KB Authoring application: Nitro PDF
MD5: f179a71efcfcb5512378844fd677e2db SHA-1: 00e5c3a899d8ca15d232f5af3022670793966412 SHA-256: 4b6988809579a7f594f8584214612cdf29ad5ca256154eef287434459a812ecd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, indicating a link farm or redirection scheme. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent, likely phishing or traffic redirection. No scripts were extracted, but the extensive link farm is the primary indicator of malicious activity.

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://ourbaptistheritage.org/uploads/1/3/0/6/130639105/7b7fbe25173d.pdf
    • http://missmillersclassroom.com/uploads/1/3/0/3/130323478/8232835.pdf
    • http://nhfd-dev-site.com/uploads/1/3/0/5/130590168/1720054.pdf
    • http://kingswordinc.net/uploads/1/3/0/6/130620483/pajefoju.pdf
    • http://femi.rapmo.ru/uploads/2020/01/28/4146579.pdf
    • http://oriolfinancial.com/uploads/1/3/0/6/130604595/rozaviv.pdf
    • http://120ebaltimore.com/uploads/1/3/0/5/130590138/walefizekubis.pdf
    • https://jufofelafoguge.weebly.com/uploads/1/3/0/5/130588419/logotogep_lojabidos.pdf
    • http://oenophiles-mauritius.com/uploads/1/3/0/6/130620704/c74d54a.pdf
    • http://mrsbhatt.com/uploads/1/3/0/4/130436441/c4b16fda4.pdf
    • http://921095437403373349.weebly.com/uploads/1/3/0/3/130323594/03c4fc.pdf
    • https://lapowawide.weebly.com/uploads/1/3/0/4/130435710/2686386.pdf
    • http://guniruk.gormosritual.ru/uploads/2020/01/29/pirolegilaporuwajox.pdf
    • http://sarawickham.weebly.com/uploads/1/3/0/6/130604723/7318988.pdf
    • http://tayadsy.tech/uploads/2020/01/27/xesibamunalimip.pdf
    • https://bimixixuno.weebly.com/uploads/1/3/0/5/130551226/wuvizax.pdf
    • http://tbrd.tech/uploads/2020/01/28/kogopanewupog.pdf
    • http://soloptometry.com/uploads/1/3/0/2/130271177/130271177.html#acca+f3+specimen+exam

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000140e.bin
acf3fa0a4ffc62ca64614a6efed2f06aab573edcfa08abbe1b059c486dc54f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140E 7724 bytes

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