Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee29d6519ec1721…

MALICIOUS

PDF

42.0 KB Authoring application: Smallpdf Desktop
MD5: 89b5b8317d47b168f044459044afe2fc SHA-1: dfb9a9648c5638bc3e75e8441b4d49233f6fec9b SHA-256: 3ee29d6519ec1721333a2271983ce4a6be3f13d08b7451548960260abb0114b0
120 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a significant number of embedded external URLs, indicating a link farm designed to redirect users to potentially malicious sites. The document body, though partially corrupted, mentions 'Active passive voice exercise class 6', suggesting a lure to disguise the malicious intent. The primary attack pattern involves leveraging a large number of external links for phishing or malware distribution.

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://chaseinsulinbox.com/uploads/1/3/0/3/130313072/resimibokikarawofe.pdf
    • http://1860tea.net/uploads/1/3/0/6/130621569/fobomowozus.pdf
    • http://bigsweatersstudios.com/uploads/1/3/0/6/130620961/1008769.pdf
    • http://myoregonterritory.com/uploads/1/3/0/4/130475918/raxorafakenerez-nojuketudimeso.pdf
    • http://rockymtnoverlandexpo.com/uploads/1/3/0/7/130739375/5135873.pdf
    • http://riveflowyoga.com/uploads/1/3/0/3/130379295/3ec637567a.pdf
    • http://red-poker.net/uploads/1/3/0/4/130483277/2993864.pdf
    • http://rose-from-concrete.com/uploads/1/3/0/5/130547576/vujebojiveteduj_sovapeduzegot.pdf
    • http://tilitoimistoanjasimola.com/uploads/1/3/0/3/130379429/vasigirez.pdf
    • http://cannablissfest.com/uploads/1/3/0/6/130621916/130621916.html#active+passive+voice+exercise+class+6

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001247.bin
1c915e3aedc1d91670e70db6588d1c8984e7ba2020d119f6bbb15642b7b59201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1247 7920 bytes
font_01_sfnt_off000068f7.bin
50224c6c483bfa86a10f62efd7baa2c756f8036c0a911ebd537387e21b2fb6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 2732 bytes

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