Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6a3e959fad98fe…

MALICIOUS

PDF

42.4 KB Authoring application: PDFBox First seen: 2020-09-24
MD5: f3b6c8fe28b769646c757591222e5981 SHA-1: f9b5e75efd2fc5d38a62e13af7ca723040752d62 SHA-256: 3e6a3e959fad98fe979e59300e98a5b969e47afa8cc2705f757bd7ba73cbff3e
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score support the malicious classification. The document body, while containing seemingly innocuous text, also embeds URLs, reinforcing the link farm hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://actionanimals.tv/uploads/1/3/0/5/130539672/jibaforuj_zapurebitodusuw_mapeji.pdf In PDF document text
    • http://myfinlandlimerence.com/uploads/1/3/0/5/130589393/negoxafopadu.pdfIn PDF document text
    • http://mifanu.ecokzn.com/uploads/2020/01/28/dusixotikivajixulef.pdfIn PDF document text
    • http://districtvba.com/uploads/1/3/0/6/130639504/3027d9b8c.pdfIn PDF document text
    • http://kclements.com/uploads/1/3/0/4/130436163/xixalurenoginu.pdfIn PDF document text
    • http://concordlawncareservices.com/uploads/1/3/0/6/130605502/zeferaz_duwomonaba.pdfIn PDF document text
    • http://foothillsbiblefellowship.com/uploads/1/3/0/7/130775383/130775383.html#chapati+hindustani+gamer+videosIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172 8984 bytes
SHA-256: 513779f6070eb9b13d4591bf2c6b6e3a91cf5f02a16a553fdc09d4434decd2db
font_01_sfnt_off000066d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D9 4232 bytes
SHA-256: 7a14fd8999ccc3534cf6073bb129b927586fc7e654267bf84196305b483839df

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