Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f89d504f1b71a4…

MALICIOUS

PDF

52.3 KB Authoring application: Solid Converter PDF
MD5: 0ae5aa3d061e76f6f036cde698dfcdbe SHA-1: f91ca79102b1054f815098476e7f90e2a1324f7e SHA-256: d3f89d504f1b71a4357697102a808624956c8727769b04f5b617ae11e9421ca6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary attack pattern involves redirecting users to a link farm, likely to serve phishing pages or malware. No scripts were extracted from this sample.

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://charliedelta.net/uploads/1/3/0/5/130552097/gebojij_lirot_ziginakumaxeben_mamor.pdf
    • http://tak.maliei.xyz/uploads/2020/01/29/8643999.pdf
    • https://tijomodu.weebly.com/uploads/1/3/0/3/130379105/8e0d3eb.pdf
    • http://akhnasemi.com/uploads/1/3/0/6/130620603/ebc96.pdf
    • http://hidefdjs.com/uploads/1/3/0/2/130270946/5746983.pdf
    • http://gexabog.goodmangal.ru/uploads/2020/01/29/magigelademis.pdf
    • http://djpoolie.com/uploads/1/3/0/6/130622083/4f7c48833.pdf
    • http://rem5vrlab.com/uploads/1/3/0/4/130483682/gidegive.pdf
    • http://heinshomeimprovement.com/uploads/1/3/0/7/130740142/kiriv.pdf
    • http://perthcleaningservice.com/uploads/1/3/0/4/130436125/5850006.pdf
    • http://renosalsa.com/uploads/1/3/0/5/130545097/rimidulebagu-mimifowevaj-nufadewomisabud.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/2/130288563/130288563.html#cohort+analysis+template

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001326.bin
21e7ea6dd50838cb2604faee40206f920dc9856089fb4140a4a8453e78e94a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326 9400 bytes
font_01_sfnt_off00008535.bin
c7143368894299a997ed09f05024df052d964886bc902d598de4a6791c50751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8535 10292 bytes

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