Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a4b23e327d03b9…

MALICIOUS

PDF

41.7 KB Authoring application: Pdftk
MD5: 4ae189e8f580bc6459bb892499db1c63 SHA-1: 1e8052e217a8730beb89b7f4f005709ebf0212ef SHA-256: 90a4b23e327d03b9fe20d39d4f34bea74d2e16895e32ab8ccd3463c7582501b0
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 external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs likely lead to further malicious content or phishing sites, serving as a redirection mechanism. 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://connectumarriageministry.com/uploads/1/3/0/5/130550818/f88d9dd872637.pdf
    • http://quillskywritings.com/uploads/1/3/0/5/130539437/tuzokezedape.pdf
    • http://mylectro.com/uploads/1/3/0/5/130588244/4ac28523785.pdf
    • http://moheal-moringa.com/uploads/1/3/0/5/130545382/1658479.pdf
    • http://xibulujij.vipiski-besplatno29.icu/uploads/2020/01/28/jozumufojalomum.pdf
    • http://uic-vie.weebly.com/uploads/1/3/0/5/130543453/doliraz.pdf
    • http://leggingss.xyz/uploads/2020/01/28/e4cc6fa5121c3.pdf
    • http://tatebexog.jintai.ru/uploads/2020/01/28/9710394.pdf
    • https://kazifovul.weebly.com/uploads/1/3/0/5/130538839/6321934.pdf
    • http://123ugf.xyz/uploads/2020/01/28/5ed660590c6c.pdf
    • http://skydivetofino.ca/uploads/1/3/0/6/130603809/9694928.pdf
    • http://nena.f90.ru/uploads/2020/01/27/nodibax-rewodon-jipazopudoxe.pdf
    • http://pameladirnberger.com/uploads/1/3/0/5/130545334/130545334.html#bhoot+fm+last+episode++fusionbd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d7.bin
2a989114816264c0653e09c6916f35b7b7cf377b7fc573305cc5133605cfea79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7 8040 bytes
font_01_sfnt_off00005ee6.bin
8d1c49e873d6d421e6da6dab635642814dcf3d846f61fa497116ee578bbaede7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 6984 bytes

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