Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa58f26fe5b3e77d…

MALICIOUS

PDF

34.7 KB Authoring application: LibreOffice Draw
MD5: f47ff1833cf77acfd3810d9ab2f1cf66 SHA-1: 221e5d56a5aa2c1f387c36da7c892dbbf3361b6a SHA-256: fa58f26fe5b3e77da2cc97354df2baef3e9dcbfb81c94255daa89d11531a8680
150 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 ML classifier and ClamAV also flagged this file as malicious, specifically as Pdf.Phishing.TtraffRobotInstall. The document body, though heavily corrupted, contains references to URLs that are part of this link farm. The primary attack pattern appears to be directing users to a large collection of external PDF files, likely for SEO spam or to host malicious content.

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://rabijaje.onlyoil.ru/uploads/2020/01/28/dipalowutowuxajowa.pdf
    • https://letoloxan.weebly.com/uploads/1/3/0/2/130289322/fewotagit.pdf
    • http://burunu.smart-standart.ru/uploads/2020/01/29/5667eb02.pdf
    • http://mitviz.weebly.com/uploads/1/3/0/6/130604877/1581063.pdf
    • https://govisodim.weebly.com/uploads/1/3/0/2/130272482/memilapif-vilobipavirowa.pdf
    • http://conciergepsychdoc.com/uploads/1/3/0/6/130620931/6432245.pdf
    • https://mewapegipudisew.weebly.com/uploads/1/3/0/2/130272485/9cfd4b583.pdf
    • http://kasap.sex-girls.icu/uploads/2020/01/29/bepurages.pdf
    • http://morgangracejarrett.com/uploads/1/3/0/2/130289543/7915279.pdf
    • http://xovenevenu.portal-doempreendedordigital.com/uploads/2020/01/27/kimisol_lurebadujol.pdf
    • https://xutebuso.weebly.com/uploads/1/3/0/2/130272945/vinat.pdf
    • https://saxutomavel.weebly.com/uploads/1/3/0/3/130379408/tawapefajuxe.pdf
    • http://ganame.stoloto.info/uploads/2020/01/29/zinibuxosute_sevekubunu.pdf
    • https://xizudujezibodap.weebly.com/uploads/1/3/0/3/130324206/9f5f56.pdf
    • http://racersedgebooks.com/uploads/1/3/0/6/130621985/gatopivesu.pdf
    • http://redshiftbrewery.com/uploads/1/3/0/5/130589322/8f3a3e9a.pdf
    • http://03862strong.com/uploads/1/3/0/2/130273740/dd7a43f.pdf
    • https://ginemuvu.weebly.com/uploads/1/3/0/2/130287992/jinogewad_kaxomakuwigepiv_ranapixepam_xabuwugafi.pdf
    • http://ceoempowerment.net/uploads/1/3/0/3/130379379/fipedezajoxeve.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/2/130270994/130270994.html#calculus+2+final+cheat+sheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001548.bin
3630f9273782e6c2f4f010c239ff745869d9c8851c6c503fb55d3d60cfdecf15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1548 7428 bytes

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