Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdfd7238749c941…

MALICIOUS

PDF

33.9 KB Authoring application: Solid Converter PDF
MD5: c7588b6084441a1ff27bf0d71cd58662 SHA-1: 0e8ebf6cc2a635dbae046fd0aae0e9a716c75fd7 SHA-256: 7bdfd7238749c9410c724139d28589e7b4a724bcb802584bb8688448cddf18f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely lead to further malicious content, as indicated by the ML_NYX_PDF_MALICIOUS classification and ClamAV detection as Pdf.Phishing.TtraffRobotInstall. The primary attack pattern involves directing users to a link farm to download additional malicious PDFs.

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://jojebamomaris.weebly.com/uploads/1/3/0/6/130604061/loxuverede.pdf
    • http://rabopoti.kronvill.com/uploads/2020/01/28/felun-tefomadewif-rolavowe-bemime.pdf
    • https://difesezu.weebly.com/uploads/1/3/0/3/130313004/2510969.pdf
    • http://threecreekaussies.com/uploads/1/3/0/4/130489564/5624383.pdf
    • http://fivu.rus-snow.ru/uploads/2020/01/27/korapibijur-gusak-sovabuse-fikivibejaz.pdf
    • http://duwimi.photo-vologda.ru/uploads/2020/01/27/377275250.pdf
    • http://puwonewu.remont136.ru/uploads/2020/01/27/9340671.pdf
    • http://keepcalmwaxon.com/uploads/1/3/0/2/130287960/a874f189601.pdf
    • http://bifolixer.artmedcy.com/uploads/2020/01/27/5191427.pdf
    • http://brighterawards.com/uploads/1/3/0/5/130540874/130540874.html#acoustica+mixcraft+4.+1+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013d5.bin
87605ca12ccb7d832af4e571d5b6e98b402e1f207fc60c44983e6c043dd87088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5 8616 bytes

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