Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee3bf42eabc7279…

MALICIOUS

PDF

35.3 KB Authoring application: Serif PagePlus
MD5: 2df38215a1036ae59883e038788fdb93 SHA-1: cda0f62099e1e7a05abbc80c40ec4278bb087c92 SHA-256: cee3bf42eabc727947a94e55f9cbbc399a72c02796a3ce9bac819c92294ca7a3
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. Static analysis revealed a large number of embedded URLs pointing to PDF files on various domains, indicating a link farm. The document body contains text related to sentence structure exercises, which appears to be a lure to disguise the malicious intent of linking to external resources. 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://neckiesbymj.com/uploads/1/3/0/2/130270982/398a8.pdf
    • http://360degree.solutions/uploads/1/3/0/5/130551554/pavudajido.pdf
    • http://thefishvan.com/uploads/1/3/0/3/130324203/7329950.pdf
    • http://bramvanroyphotography.com/uploads/1/3/0/4/130436089/sawosololadolofowosa.pdf
    • http://advancedliferesources.com/uploads/1/3/0/6/130620565/3729543.pdf
    • http://dennismodafferi.com/uploads/1/3/0/4/130476519/762ace9b429a.pdf
    • http://mpaclarke.com/uploads/1/3/0/5/130588997/73540.pdf
    • http://reneeleaberger.com/uploads/1/3/0/5/130588968/limoriguwekun_dotogi.pdf
    • http://mywelby.org/uploads/1/3/0/2/130272516/130272516.html#simple+compound+and+complex+sentences+exercises+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a8.bin
e8341c8c96825c87d67dbc02251239307ad6c57d11bcb067dea0dc447ebda1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8 7772 bytes

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