Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2aab9507df1527…

MALICIOUS

PDF

38.2 KB Authoring application: Poppler-utils
MD5: 20b1a59dadd6b3a26797c6cfbce6a7e1 SHA-1: a11a665384245a71e45a01293cdf25462b7d5d77 SHA-256: 7b2aab9507df15279271d160bc91bed9a87e708e0cc145b4349add9543618289
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, a technique often used in link farm or phishing attacks to obscure malicious intent. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate maliciousness. The embedded URLs are likely part of a campaign to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://barndoordecor.co/uploads/1/3/0/6/130604136/7226474.pdf
    • http://musebeatmedia.com/uploads/1/3/0/3/130323154/fivipetofavaz_dojapokegokula.pdf
    • http://yokel411.com/uploads/1/3/0/3/130379298/dusilemizigad_tenusodetir_gedakuja.pdf
    • http://assinaturareativacaoeletronica.com/uploads/2020/01/28/50e07b.pdf
    • http://putelo.igrovye-avtomaty-na-dengi.top/uploads/2020/01/28/4805255.pdf
    • http://itsjusmikeymusic.com/uploads/1/3/0/2/130288426/4005445.pdf
    • http://vido.statbrutedebowl.com/uploads/2020/01/28/rofunoxap.pdf
    • http://monthlyphysicalchallenge.com/uploads/1/3/0/7/130776642/130776642.html#chinese+cinderella+study+guide+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117f.bin
d040b7322e060a685b768f66ce61890d082b8f832a7285757045bbd54d4d7564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F 7840 bytes

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