Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ece6cc27a1ef24…

MALICIOUS

PDF

37.0 KB Authoring application: Mobipocket Creator
MD5: 8d5abcd9a3e9fdf467e652d40fa1d197 SHA-1: 7c0afaae6cea1ebce221892b1afae2b5c0e6ca78 SHA-256: b1ece6cc27a1ef24e0dbae24c84fa9c99210f9e42c69401de20c20509b8e4f1d
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 URLs pointing to other PDF files, a technique commonly used for SEO spam or phishing campaigns. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports its malicious nature. The embedded URLs are likely used to redirect users to malicious content or to improve search engine rankings for malicious sites.

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://researchtomorrow.net/uploads/1/3/0/5/130547624/mizepipurajak.pdf
    • http://gracecarlisle.com/uploads/1/3/0/7/130774962/bikitulaparomo.pdf
    • http://stanyarhouse.com/uploads/1/3/0/2/130270892/fuput.pdf
    • http://desatascosgava.net/uploads/1/3/0/6/130605237/c8e85c7.pdf
    • http://countrymuttmaine.com/uploads/1/3/0/7/130740180/gifaralezux_dowopidegoro_bajixosofifonex_gosem.pdf
    • http://mylighthouselearning.com/uploads/1/3/0/5/130588721/punokez-kofuz-sanixuxebopovi.pdf
    • http://antoniobuehler.com/uploads/1/3/0/5/130539260/cffd6742.pdf
    • http://www.newirmas.com/uploads/1/3/0/6/130620168/2125560.pdf
    • http://www.joebigane.com/uploads/1/3/0/5/130588370/sawofaniveboliga.pdf
    • http://koidesing.com/uploads/1/3/0/7/130776026/xoratotijusipiku.pdf
    • http://x0597057xstreamtravel.xsideas.com/uploads/1/3/0/4/130478433/130478433.html#pdftk+linux+mint+19
    • http://koidesing.com/uploads/1/3/0/7/130776026

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bcf.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCF 1708 bytes
font_01_sfnt_off00003766.bin
43506bca447ba8bad67984d1674d7217d00cd9e879bac8fd5c13dcb8617adfe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3766 8908 bytes

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