Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3703553337a94d4…

MALICIOUS

PDF

36.0 KB Authoring application: Nitro PDF
MD5: 64a52de32396c520c68c48b5bf65dacd SHA-1: ca587a2a735e54a6ff149d0f6409c10ae06c9f9f SHA-256: e3703553337a94d40b9d44d7d0a50ef603799cc84e203182f6bb9dc85e87f03a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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://cscle.com/uploads/1/3/0/7/130776629/742416.pdf
    • http://www.gearup1.com/uploads/1/3/0/6/130620642/09857be54.pdf
    • http://ampedupelectric.net/uploads/1/3/0/4/130488451/tebisorizoja_mirawuzoxija.pdf
    • http://youandyourcareer.org/uploads/1/3/0/6/130604598/tozekij.pdf
    • http://paradoxicalreality.net/uploads/1/3/0/5/130590108/6293677.pdf
    • http://theboxcar.ca/uploads/1/3/0/4/130488974/zuzimikomumurel_riwexajom_suzufuxilaw.pdf
    • http://www.strataownersolutions.com.au/uploads/1/3/0/2/130272554/vubitonalifaxow.pdf
    • http://teerland.com/uploads/1/3/0/6/130605263/6243413.pdf
    • http://takeastandforjustice.org/uploads/1/3/0/4/130488574/2611108.pdf
    • http://www.getlylty.com/uploads/1/3/0/6/130620234/riluxomovibek.pdf
    • http://linden58.pleasingfood.com/uploads/1/3/0/8/130874437/130874437.html#ssc+stenographer+recruitment+2018+salary

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003679.bin
3d52d6614b60e2949c064ca98b749b030712ba814edaa4f70234d44109265c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3679 8008 bytes

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