Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df71a8985a79193…

MALICIOUS

PDF

30.5 KB Authoring application: PDFedit
MD5: 1cf2b899a99a4eb3f07ae30f876a0f38 SHA-1: 77e56c9c8462d9db522a8ca23d4717db6294161f SHA-256: 4df71a8985a79193854dc503fed918c1d79da103b73cff298fa5cea380f01254
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, references 'Cambridge phrasal verbs dictionary second edition' and includes multiple URLs, suggesting a lure to external content. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nikkirelford.com/uploads/1/3/0/4/130483561/4383735.pdf
    • http://newglasssingapore.com/uploads/1/3/0/4/130436094/nejarisa.pdf
    • http://ayudandoteacrecer.com/uploads/1/3/0/3/130313005/1fb3d47.pdf
    • http://reboundat.com/uploads/1/3/0/5/130588893/130588893.html#cambridge+phrasal+verbs+dictionary+second+edition

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fba.bin
583fb9777ef5d2a76839494fb95865ff3544bd24b88e4d28eddb746dba448450		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA 8416 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.