Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98df0886e95062c…

MALICIOUS

PDF

45.2 KB Authoring application: Mobipocket Creator
MD5: 569c70930efa053457b3cbe44546b183 SHA-1: 20e9e4e42cc55a3c29cb51830c9fcf074973005a SHA-256: d98df0886e95062cc2d65364e656c65413d5192b7d3e7e6824891dbec0a9499c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports this assessment. 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://ameliaquilts.com/uploads/1/3/0/6/130620946/jowezaberusado.pdf
    • http://s-w-p.org/uploads/1/3/0/6/130639760/gapilewerufal.pdf
    • http://downundermigration.com/uploads/1/3/0/5/130539131/lanisewamiwet_wozide_zedalixoji.pdf
    • http://snirts.xyz/uploads/1/3/0/5/130550967/supulimesoro.pdf
    • http://northpointebaptistministries.com/uploads/1/3/0/6/130621315/5627045.pdf
    • http://mixaforiz.printtex.biz/uploads/2020/01/28/405588.pdf
    • http://hydrominer.net/uploads/1/3/0/7/130738631/293545.pdf
    • http://perthcards.com/uploads/1/3/0/5/130588559/6561299.pdf
    • http://squaretaper.info/uploads/1/3/0/6/130604456/f7e1828f3.pdf
    • http://mymissblue.com/uploads/1/3/0/5/130588596/130588596.html#a+discovery+of+witches+season+1+episode+1+review

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001250.bin
a67e545fcbdf2213a55576d93954e352e37b8afb066828bf12ee1aaa4c353878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1250 8724 bytes
font_01_sfnt_off0000760a.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 2616 bytes

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