Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a81f551bf49f6b…

MALICIOUS

PDF

46.5 KB Authoring application: PDFedit
MD5: 384e1178ed166cf2c1945dd784e46607 SHA-1: 7bb551e11b614df019a3387c490f3e04da0192ca SHA-256: 72a81f551bf49f6bb729feb0a8d99a4fa1907deaf42e097db275f75517c674a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are structured as SEO-optimized links to other PDF files, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support malicious intent. The document body, though heavily obfuscated, contains references to driver downloads and embedded URLs, suggesting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://dry-2-go.com/uploads/1/3/0/6/130621826/saripawegudoro-geredavir-nudiwapab.pdf
    • http://metalroofexpertwitness.com/uploads/1/3/0/3/130313603/cf8f0.pdf
    • http://nastynotfound.com/uploads/1/3/0/5/130551142/ffc7c606ecc5.pdf
    • http://dumo.ner1.ru/uploads/2020/01/29/416078.pdf
    • http://momentumdavis.com/uploads/1/3/0/6/130639503/wadoduraf.pdf
    • http://anewyoubeauty.co.nz/uploads/1/3/0/5/130540284/jekufadepun.pdf
    • https://fikitafisinixor.weebly.com/uploads/1/3/0/3/130313428/ac82e88679e97.pdf
    • http://sjb-productions.com/uploads/1/3/0/6/130639468/86044f4f.pdf
    • http://dobrovolnictvogkch.weebly.com/uploads/1/3/0/6/130639642/redezuvuze.pdf
    • http://tschiffely-trail.eu/uploads/1/3/0/6/130604340/xujufafa.pdf
    • http://middleschoollessons.com/uploads/1/3/0/6/130621785/nutevize.pdf
    • http://salinastowing.com/uploads/1/3/0/2/130287920/gijuwel_benopewonepu_kojal.pdf
    • http://dalestravel.info/uploads/1/3/0/7/130739897/130739897.html#d-link+wireless+dwa-130+driver
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001398.bin
351412b957006863364517587c7c44a024b0708b4041f1b232d5861f79bb78e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1398 9696 bytes
font_01_sfnt_off00006dad.bin
67fc5177fd584259d92df2d04361ee5812aeaf6169251fafb29fd1ddf16900d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 16500 bytes

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