Malicious PDF — malware analysis report

Static analysis result for SHA-256 170fc7849b9396ec…

MALICIOUS

PDF

28.1 KB Authoring application: pdf-parser
MD5: 6516c0dd1c41da83f736e3ca4d7b87ec SHA-1: 34058dc16d5b472bcd81c3fdc5eb6483e96f3b1a SHA-256: 170fc7849b9396ec136f627e0f6c4c6f6a357ed0d51917fa51d71d779b2e25da
192 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, a technique often used to obscure malicious content or redirect users to phishing sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The presence of embedded URLs and the link farm heuristic suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://turikaja.weebly.com/uploads/1/3/0/4/130435685/19c823184dd0.pdf
    • https://nibubabo.weebly.com/uploads/1/3/0/5/130588205/rilanomojedokubagiji.pdf
    • http://palmettocreditsolutions.com/uploads/1/3/0/6/130620491/noxipatiwazuvu.pdf
    • http://vaginaltighteningstickphsupplier.store/uploads/2020/01/27/bolawus.pdf
    • https://jafokirata.weebly.com/uploads/1/3/0/5/130551387/pivapegurowimez.pdf
    • http://nylasvanity.com/uploads/1/3/0/3/130323727/rixiw_debogatuzabebod_wetovune.pdf
    • http://4lawsfamily.com/uploads/1/3/0/3/130379138/bdf155.pdf
    • http://neokundalini.org/uploads/1/3/0/4/130435850/130435850.html#api+platform+generate+swagger

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001134.bin
ae3512ef51f74e6a2c91bfb841758b52f5e747753c332eb12e44780a4ef0829b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1134 7884 bytes

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