Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a75955f422871b8…

MALICIOUS

PDF

43.1 KB Authoring application: Scribus
MD5: 1f1648be2bc0a60a0e3d748a5707586d SHA-1: 88ca4a90bcb9b695f5014d8fbf218dd88d3548ed SHA-256: 2a75955f422871b893e535b1d6371fbac36bd0096a9049de7cfc4e29fe35915e
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This suggests a link farm or redirection strategy. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or malicious redirection intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://mynukshuk.com/uploads/1/3/0/6/130639762/212851.pdf
    • http://ajshealthandbeauty.com/uploads/1/3/0/5/130540063/94091c92db8.pdf
    • https://mebakisameraf.weebly.com/uploads/1/3/0/5/130590756/mebexinipadovimo.pdf
    • http://zinererija.alexupwork.com/uploads/2020/01/28/muruwikine.pdf
    • http://the-birth-project.com/uploads/1/3/0/6/130620669/2340030.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/6/130605259/1836926.pdf
    • http://cyclebavaria.com/uploads/1/3/0/6/130604798/130604798.html#transversus+abdominis+muscle+pain

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000122f.bin
4bbabf2fb291a09c559441dac0ff805d1463695af651c2911e401b0cf4738e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F 7624 bytes
font_01_sfnt_off00006297.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 16036 bytes

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