Malicious PDF — malware analysis report

Static analysis result for SHA-256 772f16130e203d6d…

MALICIOUS

PDF

40.1 KB Authoring application: Adobe PDF Library 9.0
MD5: 82e928c4d8260516f71cba5d0cbe04e6 SHA-1: f8bfec616a0941b20ff654938502280100bf566b SHA-256: 772f16130e203d6d5a0dcd859348c0f693279200c42310cffe424c000cbd66b3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malware. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or traffic redirection intent. The ML classifier also strongly flagged it as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://smoothmedia.solutions/uploads/1/3/0/5/130589454/4652083.pdf
    • http://vifesug.myopros.tech/uploads/2020/01/28/8089002.pdf
    • http://addictingshopping.com/uploads/1/3/0/4/130489475/568426.pdf
    • http://mobileweldingservice.co/uploads/1/3/0/2/130288540/ea16a878f75756.pdf
    • http://wefesigor.smm-ufa.ru/uploads/2020/01/28/1af441db4c2f4.pdf
    • http://lesitu.troika.pw/uploads/2020/01/28/3902694.pdf
    • http://relonopada.aspirantesmedicina.com/uploads/2020/01/28/zefuzi-xigetal.pdf
    • http://sunajoku.sushi-v-noginske.ru/uploads/2020/01/27/mavuke.pdf
    • http://momadojana.coffee-remont.ru/uploads/2020/01/27/dac9c1312f83.pdf
    • http://allianceforsustainabledevel.net/uploads/1/3/0/5/130544672/1599317.pdf
    • http://san69.com/uploads/1/3/0/5/130550777/130550777.html#can+a+simple+sentence+have+a+prepositional+phrase

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001433.bin
68b3ff6c88ebe17dc68ae26abf76456dfa0bf1612f63f6001aa6923f5e3c8d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1433 7984 bytes

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