Malicious PDF — malware analysis report

Static analysis result for SHA-256 985c4b1fb3762f84…

MALICIOUS

PDF

50.1 KB Authoring application: LibreOffice Draw
MD5: 02beac920a2121f204afdbf38112d33b SHA-1: 4d5eec19eebd7bc58c0b621d760a8d4d1a9064ad SHA-256: 985c4b1fb3762f846dba1171358ac441ba466d01770ff59d6361706dae1d9650
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique commonly used for SEO poisoning or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate malicious intent. The document body itself is heavily corrupted, but the presence of numerous URLs pointing to PDF files on various domains suggests a coordinated effort to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://joginezugetugu.weebly.com/uploads/1/3/0/5/130588304/nidas.pdf
    • http://olgakuhni.ru/uploads/2020/01/27/7668251.pdf
    • https://fasarakepiku.weebly.com/uploads/1/3/0/5/130542860/tilurivifuzazis.pdf
    • http://jokoxes.magiksdur.pw/uploads/2020/01/29/13698ef971ff3.pdf
    • https://saneradutikuvu.weebly.com/uploads/1/3/0/5/130541031/0ba27fe8.pdf
    • http://kekutos.fashionmoney.online/uploads/2020/01/28/xaxaki.pdf
    • http://tev.instalm.com/uploads/2020/01/28/turapubuzaxuriv_bilevajoxem_selinogebibal_wowalodabe.pdf
    • http://cellularculture.com/uploads/1/3/0/2/130287542/lukixunokedezozuxovi.pdf
    • http://roj.lulacrib.com/uploads/2020/01/27/tebemuvifapufup-nupifikowu.pdf
    • https://mefuwaviwakal.weebly.com/uploads/1/3/0/5/130544147/796055.pdf
    • http://bos.l4d4.ru/uploads/2020/01/27/560707.pdf
    • http://nosuside.itilan.ru/uploads/2020/01/28/loxetakajopesunax.pdf
    • http://kcbevco.com/uploads/1/3/0/4/130476346/130476346.html#oraculo+manual+baltasar+gracian+pdf

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013fd.bin
f8217d5c3b0ce94b64868ddee955b3765952adf230d4da9bc6bcaafb59fee336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD 10372 bytes
font_01_sfnt_off000074e1.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 2652 bytes
font_02_sfnt_off00007dad.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAD 16036 bytes

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