Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5f320f7e55df56…

MALICIOUS

PDF

37.3 KB Authoring application: PDF Studio
MD5: 4f165e303e5d89786cbf933c228e4fcc SHA-1: 1f3bcc450743704c1622f9f39caea61ed697c87c SHA-256: be5f320f7e55df569a778c8da830807b8136fc11180dd5bd7b40fc02f9d57a82
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The document body, though partially corrupted, also contains many of these URLs, suggesting a phishing or SEO spamming attempt. No scripts were extracted from this sample.

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://brecht.holyrood-drama.com/uploads/1/3/0/6/130620536/6523361.pdf
    • http://bexajinonu.stroyport.info/uploads/2020/01/28/6416429.pdf
    • https://mupobaxavunuko.weebly.com/uploads/1/3/0/5/130540401/d707618ce.pdf
    • http://milescan.com/uploads/1/3/0/7/130776814/2416215.pdf
    • http://alysebonline.com/uploads/1/3/0/3/130312920/6967956.pdf
    • http://persucarhipa.net/uploads/1/3/0/6/130621109/jerevaximubuwinixo.pdf
    • http://the-joy-of-syntax.com/uploads/1/3/0/6/130639837/2c2c455c40c2.pdf
    • http://boxinsideabox.com/uploads/1/3/0/4/130436154/195466.pdf
    • http://berkeleyfpdocs.com/uploads/1/3/0/4/130476684/8b27b52.pdf
    • http://naturestrace.com/uploads/1/3/0/5/130551728/4613106.pdf
    • http://michaelsheacounselling.com/uploads/1/3/0/2/130287311/robaluxola_zerebinejovapuv.pdf
    • http://nasiiclothing.us/uploads/1/3/0/4/130435594/130435594.html#make+traceable+letter+worksheets

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012b5.bin
139f9f93e8a183d9998e2dea5e917773822680d0d4220c4e524231f73fd3e080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5 7792 bytes
font_01_sfnt_off00005681.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5681 2616 bytes

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