Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed86a85a853aae24…

MALICIOUS

PDF

49.3 KB Authoring application: Smallpdf Desktop
MD5: cd8b461881ed89e36ab00af52d65688f SHA-1: 6bee96269054a354280078669f5324fa3dbc00c3 SHA-256: ed86a85a853aae24a3aa97a99e5784e8cee8dd163ec48b415c2319cb61ecb5d8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. No scripts were extracted, but the document body's content about 'Half wave rectifier parameters derivation' is likely a lure to disguise the malicious links.

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://edutainmint.com/uploads/1/3/0/6/130639709/detitaxojukeke.pdf
    • http://dianehenning-luce.com/uploads/1/3/0/6/130620667/8134483.pdf
    • http://broodjesboke.com/uploads/1/3/0/7/130740480/a04027f64a06.pdf
    • http://natethehitmaker.com/uploads/1/3/0/2/130272488/xorerefazoletav.pdf
    • http://oasisfurniture.net/uploads/1/3/0/6/130621464/756679.pdf
    • http://clinicalsupervisionmsw.com/uploads/1/3/0/5/130588649/tosopizelunufudiz.pdf
    • http://mrsdavisswghs.com/uploads/1/3/0/5/130542755/dubunel_sedafonedutanos.pdf
    • http://plikk.net/uploads/1/3/0/3/130379150/9531027.pdf
    • http://metrostratareports.com.au/uploads/1/3/0/6/130605302/3582512.pdf
    • http://vintagehomenewyork.com/uploads/1/3/0/2/130287246/logetibinufizuf.pdf
    • http://teamclm.com/uploads/1/3/0/2/130270997/130270997.html#half+wave+rectifier+parameters+derivation

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012b9.bin
e7a3f718b04ea816710fb6953a3ad199fb87435e99cd85e35cfdca2633604c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9 8824 bytes
font_01_sfnt_off0000712b.bin
1110447959503c75238c0f1bcdf9de7fad567fc767730a4530dcb0d3a64541bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 2696 bytes
font_02_sfnt_off00007a0f.bin
bd063a73df92dd3638e57e21446ee7f23fd344289568077020165c142934ec29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 16116 bytes

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