Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ad400c577e07c8…

MALICIOUS

PDF

46.7 KB Authoring application: OpenOffice Draw
MD5: fd4f81d344644a5d2d083094d55ea859 SHA-1: 3b51363ee6cbf3111e4012c8e19860f8db2781ce SHA-256: b1ad400c577e07c82734d43be060221e09d9567b1c8a7b2d4a065aeac5bb895d
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall and a machine learning classifier indicated a high probability of maliciousness. The critical heuristic PDF_SEO_LINK_FARM indicates the document contains a mass of external PDF links, with the first being http://scireinke.com/uploads/1/3/0/3/130323319/61cf418b2416c08.pdf. This suggests the document's primary purpose is to redirect users to a network of malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://scireinke.com/uploads/1/3/0/3/130323319/61cf418b2416c08.pdf
    • http://nicoleorangeartist.com/uploads/1/3/0/7/130740148/vajogikelijiloraxux.pdf
    • http://tel.paypal-account-support.bz/uploads/2020/01/28/tipaxajobaz.pdf
    • http://motortour.online/uploads/1/3/0/5/130588473/9093921.pdf
    • http://afaparents.org/uploads/1/3/0/6/130620846/130620846.html#hyperkalemia+in+respiratory+acidosis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001015.bin
7a609f4e3b66eae24a6be56f33d3bcd905f23d4b5707d6edc1356b18023b56ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015 8052 bytes

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