Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ed44724ff72ae6…

MALICIOUS

PDF

45.7 KB Authoring application: LibreOffice
MD5: e74c95579cef94feb73c4566d22f3619 SHA-1: 5ef1db3556cd28ffdd26bebe1ebe4cb0d1d26db4 SHA-256: b4ed44724ff72ae6a51b4587b39b3e865ed3f4a4d053fe13d191c3bb8844dbb3
152 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 documents hosted across various domains. This behavior is indicative of a link farm or redirection scheme, commonly used in phishing or malware distribution campaigns. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. No scripts were extracted from this sample, and the document body content was heavily obfuscated and truncated, preventing a deeper analysis of its specific lure.

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://barbaramars.com/uploads/1/3/0/5/130589373/ripigulasoj.pdf
    • http://lilacafe1.com/uploads/1/3/0/6/130605452/wepogojunudunev.pdf
    • http://rheadatta.com/uploads/1/3/0/4/130488700/9745964.pdf
    • http://cloakanddaggerdc.com/uploads/1/3/0/6/130621477/c63377914a22.pdf
    • http://mohitsane.com/uploads/1/3/0/6/130639710/xenefa.pdf
    • http://www.thefreshestllama.com/uploads/1/3/0/2/130289775/1449882.pdf
    • http://natationlaval.com/uploads/1/3/0/4/130488442/4885287.pdf
    • http://haitianchristianchurchaz.com/uploads/1/3/0/5/130588230/rififedexigib.pdf
    • http://dde00m.site/uploads/1/3/0/7/130776350/midokili.pdf
    • http://thewellseasonedwoman.com/uploads/1/3/0/4/130488834/1382855.pdf
    • http://www.bedsoreatty.com/uploads/1/3/0/9/130969283/1513198.pdf
    • http://rockymountainhighimages.com/uploads/1/3/0/4/130435597/tiderug-riloba.pdf
    • http://lenioffringa.nl/uploads/1/3/0/4/130483546/soxokuno.pdf
    • http://420fitness.jimmysjava.com/uploads/1/3/0/6/130639926/1783100.pdf
    • http://oliviahoff.net/uploads/1/3/0/6/130605118/gumusutugi.pdf
    • http://shopwani.com/uploads/1/3/0/8/130813851/5302914.pdf
    • http://bailefangyulechengkaihudizhi.br3h.com/uploads/1/3/0/6/130639270/130639270.html#led+blinking+code+for+arduino+uno

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000474e.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x474E 2828 bytes
font_01_sfnt_off00005465.bin
6bb2c86c6b62f0fcb6a109d51543a732edc590e3b8d4e31c1a918ac5f5513801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5465 9140 bytes

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