Malicious PDF — malware analysis report

Static analysis result for SHA-256 4474861ced1aaec1…

MALICIOUS

PDF

39.1 KB Authoring application: Mobipocket Creator
MD5: 09cc17628fcd363c32fd2057b4642d82 SHA-1: f713e5d76f64b42f5dacffe0df5e65cc63dddca6 SHA-256: 4474861ced1aaec18d584a5062cdaa4344cd5ff7ac3c5908d10cc602f3d00400
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary indicator is a large number of embedded external links pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The document body itself appears to be corrupted or contains irrelevant text, but the link farm strongly suggests a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://suor.pt/uploads/1/3/0/5/130551611/4449731.pdf
    • http://dijazo.aromastyle.biz/uploads/2020/01/27/7402932.pdf
    • http://jer.remont-msk3.icu/uploads/2020/01/29/3720322.pdf
    • http://banchanfood.com/uploads/1/3/0/2/130289732/2ebe40.pdf
    • http://northernessentials.net/uploads/1/3/0/6/130605273/5897040.pdf
    • http://clavesparatusalud.com/uploads/1/3/0/6/130620509/rozokaneme.pdf
    • http://nzhnoted.weebly.com/uploads/1/3/0/6/130639760/3999623.pdf
    • http://vapeziv.hemisphere-gnss.ru/uploads/2020/01/29/9823243.pdf
    • http://guiltypleasuredetroit.com/uploads/1/3/0/6/130604215/furiwo.pdf
    • http://resibuenasvibras.com/uploads/1/3/0/5/130550777/womajaje.pdf
    • http://ketskremas.com/uploads/1/3/0/4/130475883/zabesokosumabiz_teguvalifib_gewobugip_zegojofa.pdf
    • http://thekashempire.com/uploads/1/3/0/2/130271205/9175406.pdf
    • http://myentouragemusic.com/uploads/1/3/0/6/130639725/130639725.html#breathing+exercises+for+singers+youtube

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001304.bin
a049bd8176d3b5b3376354facf1e36884142aa48a7e3a7819a4121957c08f969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1304 8172 bytes

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