Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36276aabf7f58d4…

MALICIOUS

PDF

43.4 KB Authoring application: Smallpdf Desktop
MD5: 39b980afa3e2e4c0c230a67ef8e858bf SHA-1: 0c425cd61b36733a2225ddb67ab3a0ba4151190e SHA-256: e36276aabf7f58d41a01da4f8eede3ec97c6f2c8a4a15c5a23ac6b456ced41a9
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM'. This heuristic, combined with the ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0', strongly suggests a phishing or malicious content distribution scheme. The document body, though heavily obfuscated, mentions 'Pdf editor mac free', potentially serving as a lure to disguise the malicious nature of the links.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alanakolb.com/uploads/1/3/0/6/130603913/1231425.pdf
    • http://kuponyaarts.com/uploads/1/3/0/6/130605335/6c51e1ba7392df.pdf
    • http://michelle-leach.com/uploads/1/3/0/6/130621243/e00572ceb9.pdf
    • http://ezekius.net/uploads/1/3/0/5/130550690/bopaze_fifitobos_memutiro_vekud.pdf
    • http://www.scruggsmetalworks.com/uploads/1/3/0/2/130272282/ff91b.pdf
    • http://2chickschatabouteggs.com/uploads/1/3/0/5/130588515/wufasipip.pdf
    • http://cashoffer2day.com/uploads/1/3/0/4/130490378/5f6fcbd9e14323e.pdf
    • http://dayoldcupcake.com/uploads/1/3/0/6/130604286/9622538.pdf
    • http://tigerlilyphoto.com/uploads/1/3/0/2/130288729/6b2d89e7e47bcb.pdf
    • http://dazluq.com/uploads/1/3/0/6/130621854/zibarojoduju.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/5/130550714/130550714.html#pdf+editor+mac+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005107.bin
562aef8f863543aaf6fae4357e2ac10cc3782a62e3d9c83543a35abac14cd8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5107 9024 bytes

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