Malicious PDF — malware analysis report

Static analysis result for SHA-256 35965b7b62a48468…

MALICIOUS

PDF

34.9 KB Authoring application: Nitro PDF
MD5: a412e422d85e5f5d6c995f864eb58fb0 SHA-1: d755d6022da257ca00aa4628c9a759d1d366598c SHA-256: 35965b7b62a484685bb2584aebd536c25a4dad653ee5fb591541701c16ca2c9c
150 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for a link farm and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains numerous embedded URLs pointing to external PDF files. The primary attack pattern appears to be the distribution of a large number of links, likely to manipulate search engine results or to serve as a landing page for further malicious activity.

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 https://vekogawiregalo.weebly.com/uploads/1/3/0/4/130483564/xojatosavokopuv_mudaroremuni_daxomuwarepa.pdf
    • http://za20minut.ru/uploads/2020/01/28/gizotibivegomiv.pdf
    • http://zexeb.coldmineral-soap.com/uploads/2020/01/29/2896760.pdf
    • http://familiesfeedinghope.com/uploads/1/3/0/2/130272918/livakevefufirile.pdf
    • http://mansikkala.com/uploads/1/3/0/6/130621313/bf613e51423b3e2.pdf
    • http://zepuki.foodtrucksquare.com/uploads/2020/01/27/kokabelalavife-nokadoguwojago.pdf
    • http://hollandfoto.com/uploads/1/3/0/5/130543467/mebabowasu.pdf
    • http://buj.imawareness.ru/uploads/2020/01/28/kimaloredezob_gixirub_vobevowinidasok_xegufonikiw.pdf
    • http://messiniako-catering.com/uploads/1/3/0/2/130271001/samiti.pdf
    • http://053748270.com/uploads/1/3/0/4/130476158/fijinuleferolij_rawixikidewobo_dujano.pdf
    • https://nalizoxuvot.weebly.com/uploads/1/3/0/4/130489228/413297.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/6/130639689/130639689.html#java+12+ubuntu

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001340.bin
06f80b8c43ba4c9d0fccb3ddf519bf1bff5fcc2dc499b2a971c34cbc85331247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340 8132 bytes

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