Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa283a74b79f807…

MALICIOUS

PDF

36.3 KB Authoring application: PDFedit
MD5: beeac5484139456325a184d37aff6ecf SHA-1: 9c9773731978549de048c1a83f1f6bdea8bf6c1c SHA-256: daa283a74b79f807dfca7a2b477e431e892594956d31d4f8fcc1b98def0b5911
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDFs, a technique often used for SEO poisoning or to distribute malicious content. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or malicious download workflow. The document body, though heavily obfuscated, contains references to 'Calculus 1 pdf 12th edition' and includes numerous URLs, reinforcing the lure to download further content.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bemuj.nttrus.com/uploads/2020/01/27/d50c61ab.pdf
    • http://whatthehula.org/uploads/1/3/0/5/130544147/9388455.pdf
    • http://christyhelps.com/uploads/1/3/0/6/130603989/6653110.pdf
    • https://butoruru.weebly.com/uploads/1/3/0/2/130271187/f81cf85.pdf
    • http://thehallofframe.com/uploads/1/3/0/4/130489072/7063503.pdf
    • http://motekez.om-dao.ru/uploads/2020/01/28/8820306.pdf
    • http://buke.saytal.ru/uploads/2020/01/27/tanoforatepodi.pdf
    • https://marokunud.weebly.com/uploads/1/3/0/2/130289431/1032231.pdf
    • http://wedulike.vodabur1.ru/uploads/2020/01/28/b5d23e20de5.pdf
    • http://greatertoukley.org/uploads/1/3/0/5/130543671/130543671.html#calculus+1+pdf+12th+edition

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001150.bin
2d5f3a1319192e42571ec4b8614e4566055c198e14f4c03bab3b489ef0d90026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150 7864 bytes

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