Malicious PDF — malware analysis report

Static analysis result for SHA-256 d836a4a1e2b60bad…

MALICIOUS

PDF

35.1 KB Authoring application: Nitro PDF
MD5: 59de07f8bad68000bf3f5463afd3119c SHA-1: cbb45275fda39bcdaf4dd5b72b7aa18128ad2a04 SHA-256: d836a4a1e2b60bad2855c9d3831407a45022ec397d41b952e7928e8c78c101b8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. ClamAV also detected this file as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a phishing or malicious content distribution scheme, where users are enticed to click links that lead to further malicious content. No scripts were extracted from this sample.

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://admgems.com/uploads/1/3/0/2/130288394/petiroguzude.pdf
    • http://kugup.flewka.ru/uploads/2020/01/28/fawidadivufiwop-gopejafuxe.pdf
    • http://nmcawomenscricket.com/uploads/1/3/0/2/130272081/9410531.pdf
    • http://saloteflorist.com/uploads/1/3/0/7/130738994/retusarare-zimikekonafobox-luvofigowex-vunonamonujo.pdf
    • http://nordicwalkinglondon.com/uploads/1/3/0/4/130488626/vadumana_sinosa.pdf
    • http://cancercoloring.com/uploads/1/3/0/6/130604733/3db855580bd.pdf
    • http://somethingelse.org.uk/uploads/1/3/0/6/130603977/razevix.pdf
    • http://neurodevelopmentandhealingbydesign.com/uploads/1/3/0/2/130287837/130287837.html#powerpoint+free+template+simple

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001148.bin
c348fbcaa9a283325e3ddb4c4bc7c8f162a82e3e7f6dd5e5453ccdbcbff8150e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148 7644 bytes

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