Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8114843f94332f…

MALICIOUS

PDF

74.7 KB Authoring application: Smallpdf Desktop First seen: 2020-09-04
MD5: 73d1a7422fe37f73e88582f3f2dea5c1 SHA-1: b791ac0d3393a4bdd6cfc94618f01407499981a3 SHA-256: 2d8114843f94332ff79d5fea1f123dd73daa77cbf15ba4450759b31d9c13adb7
152 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, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, mentions "New toeic reading test" and includes several of these URLs, suggesting a lure to a phishing or malware distribution site. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing or traffic redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://orangecountybestwindowtinting.com/uploads/1/3/0/5/130588287/zevumowulodilud_bejolu.pdf In PDF document text
    • http://harmonicspresents.com/uploads/1/3/0/2/130272070/fowuputusezizobameju.pdfIn PDF document text
    • http://mobilebillboardssantaclara.com/uploads/1/3/0/6/130604321/kekinosapogi.pdfIn PDF document text
    • http://ardmorevetservices.com/uploads/1/3/0/4/130494801/kawugisimo.pdfIn PDF document text
    • http://fcflow.com/uploads/1/3/0/3/130323900/mezitedixejomegiz.pdfIn PDF document text
    • http://dij.herheddoha.pro/uploads/2020/01/29/bibaredine_remepin_zavegojawoteva.pdfIn PDF document text
    • http://accomadationmadeeasy.com/uploads/1/3/0/4/130489275/rarefarezezigixotak.pdfIn PDF document text
    • http://beeidentification.com/uploads/1/3/0/6/130605420/130605420.html#new+toeic+reading+testIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD 13352 bytes
SHA-256: bb373008d8f5421b7ebb9616c5d7c4867ca8b914717848baf32465bd2e1fca7f
font_01_sfnt_off0000c967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC967 2808 bytes
SHA-256: 3cd3c87506989534f3d8a377441e40008b53e01b7025805b91a0ba91f44d1fdf
font_02_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 25124 bytes
SHA-256: 112780e34a1a6646a3ca1a0c691c7f452c9af6511f2ce39a75a4578a8a6ef016

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