Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8377880d565fafc…

MALICIOUS

PDF

33.4 KB Authoring application: LibreOffice
MD5: 13e5da093b9a7e58b7b167772d826490 SHA-1: 90e2f439bedd5b0d26ac87e22cc3c513ab89c62d SHA-256: a8377880d565fafc4d241dd7b510860bb2ed55ab85e8fee7be776be9cdb2eb12
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. Static analysis revealed a large number of embedded URLs, indicating a link farm designed to direct users to external content. The primary heuristic, PDF_SEO_LINK_FARM, confirms this behavior, with the dominant host being babenow.com. The document body, though heavily obfuscated, contains references to these external PDFs.

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://babenow.com/uploads/1/3/0/6/130640022/lavanilutudo.pdf
    • http://mta-sts.mail.midwestmulticulturalassociation.org/uploads/1/3/0/5/130539022/8af0274878692b2.pdf
    • http://ulucommerce.com/uploads/1/3/0/7/130739495/57beb2e75f0e1c9.pdf
    • http://latriboo.com/uploads/1/3/0/6/130620341/moziwi.pdf
    • http://katherinemunster.com/uploads/1/3/0/7/130776535/padubanosudinekevuvu.pdf
    • http://catchacloudfarms.com/uploads/1/3/0/5/130540197/mebasaneta.pdf
    • http://alaskacharr.org/uploads/1/3/0/6/130621020/8912326.pdf
    • http://sleepoutlouies.com/uploads/1/3/0/5/130542996/sawum.pdf
    • http://mynathalies.nl/uploads/1/3/0/4/130476720/0ab155146e2.pdf
    • http://74-123-78-87.mgwnet.com/uploads/1/3/0/5/130550827/6345875.pdf
    • http://raiseyouruxiq.com/uploads/1/3/0/6/130640009/6468698.pdf
    • http://storystickies.com/uploads/1/3/0/7/130738945/6649357.pdf
    • http://wbd3.net/uploads/1/3/0/6/130604175/lizisasewa.pdf
    • http://ldjsnational.com/uploads/1/3/0/7/130775448/zegitojix.pdf
    • http://webdisk.cellar27furnitureco.com/uploads/1/3/0/3/130379575/b515100e9.pdf
    • http://bet365beiyongwangzhi.br3h.com/uploads/1/3/0/3/130313555/130313555.html#ayala+corporation+financial+statement+2018

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002773.bin
8bdca0f8cfabb4818b19582ba80d5094e4b5d581977054bed8e815016e3c6cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2773 8020 bytes

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