Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d3e6496684f710…

MALICIOUS

PDF

35.8 KB Authoring application: Adobe PDF Library 9.0
MD5: 9e21be30fbb1d7e541e415647ec1f21e SHA-1: 81a3d34b42f67592dd9f8d542e018d5efa94c4d7 SHA-256: 34d3e6496684f7107d08cc4daa9dfaddec313344e9693333088a89347566a835
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites. The document body, though partially obfuscated, contains text related to weather reports, serving as a lure to disguise the malicious nature of the links.

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://zotu.marketdota.ru/uploads/2020/01/28/mezupumukeni-xowena-verigerujafiz.pdf
    • http://munired.prowriting.ru/uploads/2020/01/27/5143879.pdf
    • https://kaxebumuxow.weebly.com/uploads/1/3/0/4/130435787/255dbe.pdf
    • http://havemeyerhomies.com/uploads/1/3/0/3/130323593/8031646.pdf
    • http://mosinztorg.ru/uploads/2020/01/27/d20484f6.pdf
    • https://rakazolonavopi.weebly.com/uploads/1/3/0/2/130273573/jejobusujovi.pdf
    • http://getmarketing.club/uploads/2020/01/27/61d03a2a85.pdf
    • https://jeninapefazi.weebly.com/uploads/1/3/0/4/130488583/3567560.pdf
    • http://naziz.womens-news.ru/uploads/2020/01/29/940992.pdf
    • http://dpaulart.com/uploads/1/3/0/5/130539798/b3ec8.pdf
    • http://capoeirabayonne.com/uploads/1/3/0/3/130323161/2949775.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/5/130551008/130551008.html#current+satellite+weather+report

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001201.bin
a5d7dfb04a43254e4198d36c76f53aff8bf9002c37bc9ecd9c4ff12bf3d0e168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201 7556 bytes
font_01_sfnt_off00004419.bin
4b01d997eddfd6ec4066ac76a2f2dcbcbc3384162804b1130a19333605e5c975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4419 16212 bytes

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