Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f6a924c30ccaf5…

MALICIOUS

PDF

36.5 KB Authoring application: Pdftk
MD5: 063797844c32e5da7db23d12699a0b5f SHA-1: 76de6f0e6735ab14bcc8993e4b46efada96f4cd1 SHA-256: d5f6a924c30ccaf549b79927a89f6d7261d291e8ce5e546cdee9b874e6240ec1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves directing users to a link farm, likely for SEO manipulation or to serve further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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://rob.davidmazurphoto.com/uploads/2020/01/28/gujaguvodufadolug.pdf
    • https://mazolaguvoka.weebly.com/uploads/1/3/0/6/130604045/notamosupogemunuwiwo.pdf
    • http://morrisandsilvester.com/uploads/1/3/0/6/130604606/zugomipoxajevexol.pdf
    • http://zizog.brazilplan.club/uploads/2020/01/27/fedaronovijorap_vopalodimep_podozuxakezado_zememuninaf.pdf
    • http://zes.knvanna.ru/uploads/2020/01/27/jimesunisokoganuxaw.pdf
    • http://valleybikecommute.com/uploads/1/3/0/6/130604056/fumagefikigoleberilu.pdf
    • http://princess-swan.ru/uploads/2020/01/28/1540ef2100.pdf
    • http://metzteaching.org/uploads/1/3/0/4/130488157/robeden_pexazesal_wojem.pdf
    • http://thebedrockinitiative.org/uploads/1/3/0/6/130604838/vafebazo-ferib.pdf
    • https://refuzetone.weebly.com/uploads/1/3/0/5/130551526/nifovow_zekoni.pdf
    • http://wafazot.migraskop.com/uploads/2020/01/29/2328869.pdf
    • http://proastrologiu.ru/uploads/2020/01/29/tosemu-gasidipavonos.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/6/130604048/130604048.html#brag+sheet+example+for+work

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001346.bin
edce5df49ef6a8bea1a222bd88571c5c67a9acc688fe2d2f878dbce2478b9f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1346 7836 bytes

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