Malicious PDF — malware analysis report

Static analysis result for SHA-256 4778a441aa79235b…

MALICIOUS

PDF

43.6 KB Authoring application: pdf-parser
MD5: 90a33ade7566ee221e8af08f55278a39 SHA-1: a41dced642cbbfd2d12f608c36f6e6ec3224ba89 SHA-256: 4778a441aa79235b685a85bd72848f99229d4216a02b986b5e62ab29e07bb9ac
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as a phishing-related malware. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary attack pattern appears to be directing users to a network of linked PDF documents, likely for SEO spam or to serve as a distribution point for further malicious payloads.

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://monartisticpet.com/uploads/1/3/0/4/130490155/xorusimevipote.pdf
    • http://jioulian.com/uploads/1/3/0/5/130543198/zegevesika.pdf
    • http://fegajed.americanadeidiomas.com/uploads/2020/01/29/4c8edda7.pdf
    • https://sepufaxekamop.weebly.com/uploads/1/3/0/2/130271114/dazuw.pdf
    • http://nextripchile.com/uploads/1/3/0/5/130551962/wiranojawin-silate-rapefetamaloval.pdf
    • http://northwestpetsupplies.com/uploads/1/3/0/6/130621385/6932860.pdf
    • http://milub.olikx.xyz/uploads/2020/01/27/sunuganiguraf.pdf
    • https://tuloxakinusen.weebly.com/uploads/1/3/0/4/130483412/8102254.pdf
    • http://maxoteb.ceodentvicalvaro.com/uploads/2020/01/28/zuxusafowisifepevi.pdf
    • https://bafonaxewul.weebly.com/uploads/1/3/0/2/130272600/7095126.pdf
    • http://ebc3.org/uploads/1/3/0/4/130489371/5810144.pdf
    • http://jdstom.ru/uploads/2020/01/27/mekuk-gidolibemalila.pdf
    • http://deniliv.e7ernall.pw/uploads/2020/01/27/3134703.pdf
    • http://jaecstore.com/uploads/1/3/0/2/130288479/tufuv.pdf
    • http://misssampson.com/uploads/1/3/0/3/130379051/lusutozafoko-kovukomebon-ruwewerolise.pdf
    • http://firstmedicalequipments.com/uploads/1/3/0/3/130379522/7750458.pdf
    • http://siluk.audiostart62.icu/uploads/2020/01/29/ziraz.pdf
    • http://shannanstanciuforschoolboard.com/uploads/1/3/0/4/130490221/xonawowivomev-xezojumos-joriv.pdf
    • http://work-ok.ru/uploads/2020/01/27/c7c3793d5a83.pdf
    • http://confidentbusinesssuport.com/uploads/2020/01/27/63a799e7af3f8.pdf
    • http://chrisreidstudio.net/uploads/1/3/0/4/130479123/wokegava.pdf
    • http://fodozu.tele2store.ru/uploads/2020/01/28/miluseka.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/6/130621248/130621248.html#fraction+worksheets+for+3rd+grade+worksheet
    • http://confidentbusinesssuport

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000109f.bin
0e25a13c6c8a07e428e200f5b2305500407516ef4c5895888190b86341ac2564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109F 7860 bytes

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