Malicious PDF — malware analysis report

Static analysis result for SHA-256 c449f41022f3a986…

MALICIOUS

PDF

49.1 KB Authoring application: PDF Studio
MD5: 3024b0ce6590d3572da480e1f83ae9b6 SHA-1: 39df3793f57e59c7d285e8aef841d89e6c14ccf6 SHA-256: c449f41022f3a9864b5b02d34f2dc927012d815af35a0e16c90f810a1a7918f1
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm used for SEO manipulation or to distribute malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it as malicious with high confidence. The primary attack pattern involves directing users to these external links, which could host phishing pages or further malware.

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://dalal.la/uploads/1/3/0/5/130590334/lisiduxerezikatizonu.pdf
    • http://islandecigandvapeco.com/uploads/1/3/0/3/130323803/lejiku.pdf
    • http://www.winstonblair.com/uploads/1/3/0/7/130740056/4836314.pdf
    • http://wojtasekrealty.com/uploads/1/3/0/6/130605175/8839349.pdf
    • http://cannacab420.com/uploads/1/3/0/3/130313153/ec4555200b157.pdf
    • http://simply-sarah.co.uk/uploads/1/3/0/2/130272586/453bb7.pdf
    • http://imemorybuddy.com/uploads/1/3/0/7/130738780/kugemewujapakobeji.pdf
    • http://lisatroutman.com/uploads/1/3/0/6/130604564/fufora_jowoli.pdf
    • http://moms-space.net/uploads/1/3/0/2/130270746/wujegevaxini.pdf
    • http://wrestlingbids.com/uploads/1/3/0/2/130289774/f3752fffe547e64.pdf
    • http://bluegrassbnb.com/uploads/1/3/0/7/130739264/a4005bcc7baa6.pdf
    • http://thebigestore.com/uploads/1/3/0/9/130969976/130969976.html#theory+and+application+of+polyacrylamide+and+agarose+gel+electrophoresis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006977.bin
f4591c48fd216b652ce6279b7dbea79f0d91f3ddcef3d0c995707ff270fcc072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6977 8236 bytes

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