Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2e4be711a0d1a7…

MALICIOUS

PDF

39.1 KB Authoring application: Nitro PDF
MD5: 25cbb3f7931e81f4532ff7a4f5d1a57f SHA-1: 87e563e2c619548348cf0e51f28ba201029437db SHA-256: ab2e4be711a0d1a77c2b494122d62b46dddf221d16ea8a4ea25d719533a0c785
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links for phishing or malware delivery.

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://bigbluerepairs.com/uploads/1/3/0/6/130621630/boxunifus-fasomeri-lujebudan-pufemot.pdf
    • http://maiandbrandon.com/uploads/1/3/0/5/130551303/judatala-sirabese.pdf
    • https://nokuwuvonomiwi.weebly.com/uploads/1/3/0/3/130323507/tiwapiloporibagadi.pdf
    • http://electro-voz.ru:80/uploads/2020/01/29/9013722.pdf
    • http://guarchibao-fatcaps.info/uploads/2020/01/28/difozekexupo_ratowivodige_tuxaninig_pigodov.pdf
    • http://hoex.ru/uploads/2020/01/29/cc09efa20bc0b.pdf
    • http://msfontes.com/uploads/1/3/0/2/130287920/6135668.pdf
    • http://skmarketing.com/uploads/1/3/0/6/130604701/442076b57b9.pdf
    • https://memusomiwapab.weebly.com/uploads/1/3/0/5/130543059/zamid-kaxejelogowozab-fosugedufepusok.pdf
    • http://erielimoservices.com/uploads/1/3/0/5/130589009/zejipe_vikojepuv.pdf
    • http://karib.landysheva.ru/uploads/2020/01/27/rajuzimo.pdf
    • http://cuppagusto.com/uploads/1/3/0/6/130639755/mobikugalejaf-mukok-zatijurofatev.pdf
    • http://alwaysanoil.com/uploads/1/3/0/2/130287799/faretegu-losabojopoxilol.pdf
    • http://nbhighschool.weebly.com/uploads/1/3/0/2/130272275/vofiretelovej.pdf
    • http://portal.createweb24.com/uploads/1/3/0/2/130287269/130287269.html#management+succession+planning+template

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000160d.bin
6495f4365956f52fbfb7ba52af2cc624107909134759202490041b154f070276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160D 8292 bytes

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