Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd06f61b7ecc1acc…

MALICIOUS

PDF

44.7 KB Authoring application: Mobipocket Creator
MD5: 60aedae845e850d18990013c1eefa89f SHA-1: 9d50e09a3cab97d52c1bbe4814db884e7257e8ac SHA-256: bd06f61b7ecc1acc2bd6f9594d71a7fc9f49977ad9154e2ff950ac60214e023e
120 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. Static analysis revealed a PDF SEO link farm heuristic, indicating the document's primary purpose is to host multiple external links. The document body, though heavily obfuscated, contains references to statistical calculations and embeds several URLs, the most prominent being 'http://basecamp-branding.com/uploads/1/3/0/4/130489763/rokoserezeden.pdf', which is part of the link farm.

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://basecamp-branding.com/uploads/1/3/0/4/130489763/rokoserezeden.pdf
    • https://xovinebuzexexe.weebly.com/uploads/1/3/0/2/130289296/xevudokavajenupuw.pdf
    • http://nealyibclc.com/uploads/1/3/0/6/130621665/nibapegugizod.pdf
    • http://apacint.com.au/uploads/1/3/0/5/130551188/10114e64.pdf
    • http://cisledhockey.com/uploads/1/3/0/6/130604710/9e8b538f41cdd.pdf
    • http://foothillsbiblefellowship.com/uploads/1/3/0/8/130814288/130814288.html#f+test+calculator+anova

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000109e.bin
1fa4b2f2120f7ae49bd4ad6ec70ad606debd7daf14fc4662fdba131eac2058cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E 8628 bytes
font_01_sfnt_off000073c3.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C3 2860 bytes

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