Malicious PDF — malware analysis report

Static analysis result for SHA-256 666d11ecaedd4c12…

MALICIOUS

PDF

41.6 KB Authoring application: LibreOffice Draw
MD5: 1274659655cffcac611b610adb33d9f1 SHA-1: 8b52bb41f00b270147d7dd90c1ca5803ac7366b9 SHA-256: 666d11ecaedd4c12ec978f0fb83aa3a8fe1d0148c53f362e2aea4a29329c051d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and ML classification strongly supports maliciousness. The embedded URLs are the primary IOCs, suggesting a content distribution or redirection scheme.

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 http://xakadis.1304shopff.fun/uploads/2020/01/28/rosap-fopemifad-galoba-sagamupax.pdf
    • http://liveslivedwithlaw.net/uploads/1/3/0/2/130289427/numifadopon_narowabapisuk.pdf
    • http://puwaf.xelamit.ru/uploads/2020/01/28/murikoju-wujuzuvifumuwi-wibisarorevib.pdf
    • http://pir.vietnamconsult.online/uploads/2020/01/27/dazawofepe.pdf
    • http://bloodoncanvasmovie.com/uploads/1/3/0/3/130323146/4333469.pdf
    • http://americanasdobrasil.com/uploads/2020/01/28/7801468.pdf
    • http://kifatutofa.audiostart32.icu/uploads/2020/01/27/pitogowa-vutom-palopa-jizowizel.pdf
    • https://vutevaxanu.weebly.com/uploads/1/3/0/4/130490875/kujuf.pdf
    • http://smt-hb.ru/uploads/2020/01/29/poguni_pumekire_pamomeda.pdf
    • http://kairosart.org/uploads/1/3/0/2/130287839/talovo.pdf
    • http://tgi420.ca/uploads/1/3/0/6/130603771/4595661.pdf
    • http://rheadatta.com/uploads/1/3/0/2/130272937/a41acfa921.pdf
    • http://nedasiwi.mosinztorg.ru/uploads/2020/01/27/23fc32afd1b6d.pdf
    • http://palmex.ca/uploads/1/3/0/6/130620712/5179027.pdf
    • http://cyclebavaria.com/uploads/1/3/0/3/130379272/130379272.html#hks+ssqv+installation+manual
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000157d.bin
ab2d5881263ec11a994f30c41a817ad1b482f78ab137ebc5404f0ddc7f34d18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157D 8136 bytes
font_01_sfnt_off00004ebc.bin
2f79ba52acca039e5c354f09c372eb8b3e5c303dfc88b98fa2ec462876c681ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBC 16160 bytes
font_02_sfnt_off00006334.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 4144 bytes

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