Malicious PDF — malware analysis report

Static analysis result for SHA-256 f497339347d3950f…

MALICIOUS

PDF

35.9 KB Authoring application: pdf-parser
MD5: f9c5a42abb402fed3d4f8b88d4342515 SHA-1: 8ac73f631d2f60419c3386c699978dc6d45bca9a SHA-256: f497339347d3950f6645a8f53789ef8970a4f5b02c85261d454700030ed20cf9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a link farm designed to manipulate search engine results or distribute further malicious content, rather than a direct phishing or exploit attempt within the PDF itself.

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 https://fadarotujoxap.weebly.com/uploads/1/3/0/2/130289658/3514778.pdf
    • http://wolug.populair-cyber.com/uploads/2020/01/28/918942.pdf
    • http://legenthology.com/uploads/1/3/0/3/130379488/waberud.pdf
    • http://fixejeg.gcointrading.com/uploads/2020/01/27/waxibolatopuza.pdf
    • https://dajekapixidi.weebly.com/uploads/1/3/0/3/130379305/073f75f.pdf
    • http://buxedi.rucoolcash.xyz/uploads/2020/01/27/lupozagolut.pdf
    • http://jososesewe.myshop8.site/uploads/2020/01/27/lefobape.pdf
    • http://kmmaintenanceservicesllc.com/uploads/1/3/0/6/130639797/filumibulevaxel.pdf
    • http://guniruk.gormosritual.ru/uploads/2020/01/29/kexekukukimex.pdf
    • http://sinafipid.oleg-vytkin.ru/uploads/2020/01/28/52c5c19e162.pdf
    • http://softskilltraining.ch/uploads/1/3/0/6/130604144/lebimekifu_kakuvozitezod.pdf
    • http://writingbydesignpr.com/uploads/1/3/0/2/130291575/turuv_sonoj_tilalibana_lufujekoguva.pdf
    • http://abingdoncc.org/uploads/1/3/0/4/130488661/130488661.html#belajar+photoshop+cc+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000133e.bin
3364bb3cd848a8e067cd780d3c33988882cbfed49d7a6bd74c7babf02c752f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133E 8040 bytes

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