Malicious PDF — malware analysis report

Static analysis result for SHA-256 22831f8fb42bf0e3…

MALICIOUS

PDF

41.7 KB Authoring application: Smallpdf Desktop
MD5: 87fc5ae1dff8e0427ce19e8e194eaf36 SHA-1: 816aea47705baf8a88df694c155280c185fee244 SHA-256: 22831f8fb42bf0e3bb93c7eb4af9d16e1a433bc5096e6bdc4f3ad33052c42bc8
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags it as Pdf.Phishing.TtraffRobotInstall. This suggests the primary attack pattern is to redirect users to malicious or SEO-manipulated content. The embedded URLs are the main indicators of compromise.

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://minidvdworld.com/uploads/1/3/0/5/130550681/fenufuvinip.pdf
    • https://vigudojifezisi.weebly.com/uploads/1/3/0/5/130589373/tagexufotobedub-makawuwisej-wezido-wawobikezop.pdf
    • http://morjanaspain.com/uploads/1/3/0/6/130603978/dawuvolo.pdf
    • http://cityonloc.com/uploads/1/3/0/4/130436207/130436207.html#aashiqui+2+songs+audio++naa+songs

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000118f.bin
5128d595f1486f32bff3d54233859d8bf43de44a5993e5e9d901d98f41c254d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F 7880 bytes
font_01_sfnt_off00005d51.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 16036 bytes

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