Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcda9527a4be3bef…

MALICIOUS

PDF

34.1 KB Authoring application: Poppler-utils
MD5: 9b2378343c45149e1eb3ebc5cd6e13d6 SHA-1: eac710a0aae86a3aeb70efe38032fd7c93b79452 SHA-256: bcda9527a4be3beff052763b94768a565164852039b59fcb08f136401f8f35d8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. The heuristic PDF_SEO_LINK_FARM indicates the presence of a mass external PDF link farm, with several unknown reputation URLs extracted. The document body contains text related to 'Plenty of fish pro apk' and includes these same URLs, suggesting a lure to download further 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 http://rotagusa.bestate.ru/uploads/2020/01/27/6295afe070.pdf
    • http://topewobe.satellit55.ru/uploads/2020/01/29/kuzoduseni-xifumo-xoripedop-zumek.pdf
    • http://stehlingwalker.com/uploads/1/3/0/4/130436165/6314158.pdf
    • https://jelereti.weebly.com/uploads/1/3/0/3/130323491/bcd455ee43.pdf
    • http://dimi.pnptogo.com/uploads/2020/01/28/bavito.pdf
    • http://reboundat.com/uploads/1/3/0/5/130544243/130544243.html#plenty+of+fish+pro+apk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000108a.bin
e38a45d4ccd109b763e6b0c447cb9d964d93ede4b9e2d46c6b8892f4cc29d566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A 8152 bytes

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