Malicious PDF — malware analysis report

Static analysis result for SHA-256 a221629abad4cf99…

MALICIOUS

PDF

40.0 KB Authoring application: Serif PagePlus
MD5: 1846a68eb9bbfb82f244b657f6cfb9aa SHA-1: 50d9c4e81094b5ac84df7cfc609c51334681b28c SHA-256: a221629abad4cf9984ead3a73dbbf6fee627d7d97f0921e94a558fe0d7b17b6a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The ML classifier also strongly flagged this file as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://thedecoratorseye.com/uploads/1/3/0/6/130620689/9304622.pdf
    • http://buy-consoles.com/uploads/1/3/0/6/130620898/8701295.pdf
    • http://centralstockcare.com/uploads/1/3/0/3/130379412/1434462.pdf
    • http://soulcraftmans.com/uploads/1/3/0/5/130539923/5230043.pdf
    • http://nwrilg.net/uploads/1/3/0/7/130739483/9924047.pdf
    • http://zumbatinleypark.com/uploads/1/3/0/4/130488362/3c2b0659c.pdf
    • http://myremtec.com/uploads/1/3/0/6/130603946/bawozen-zexekap.pdf
    • http://www.babysittersforkidscamp.com/uploads/1/3/0/6/130639906/763953.pdf
    • http://www.eaglehvac.org/uploads/1/3/0/5/130541000/durido-takaduj-xefuwopivo.pdf
    • http://www.gresfordpark.com/uploads/1/3/0/6/130640027/501910.pdf
    • http://acomputerconsultant.com/uploads/1/3/0/5/130539205/213007.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/6/130621487/38df8a2.pdf
    • http://www.purplediamondsonline.com/uploads/1/3/0/7/130775685/06e562.pdf
    • http://drinkresponsively.net/uploads/1/3/0/6/130620542/zewiwugemaloliser.pdf
    • http://michaelkressdesign.com/uploads/1/3/0/5/130540246/ziboxojegamapomiwaxa.pdf
    • http://katieandelias.com/uploads/1/3/0/6/130620668/0e0f85c.pdf
    • http://olddominionsausage.gammaxiques.org/uploads/1/3/0/7/130776739/130776739.html#anatomy+and+physiology+coloring+workbook+chapter+2+basic+chemistry

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e29.bin
ca8016f4bf6f94a96a59e6bfdf7e10dffe0ecacbf020722bd3f8e260af86e700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E29 9100 bytes

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