Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc68a7f654c2ad3…

MALICIOUS

PDF

79.4 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 21efafa4ff16ca5d069d930fe18a8d24 SHA-1: 8992bdb29837a0cb794e2d3f6b7ccc3a8a653496 SHA-256: 6cc68a7f654c2ad3646063f9f7bba0616c870933cbb4eda7549e373bdb9cff44
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files, a common technique for SEO poisoning and distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the embedded URLs suggest an attempt to redirect users to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://northwayds.com/uploads/1/3/0/3/130323130/491a2163b.pdf In PDF document text
    • http://thefarmatcentralvillage.net/uploads/1/3/0/5/130590507/698229.pdfIn PDF document text
    • http://angelavinson.com/uploads/1/3/0/3/130379463/8940d.pdfIn PDF document text
    • http://kreativekidsworld.com/uploads/1/3/0/6/130620912/130620912.html#samsung+sa350+driver+windows+7In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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_off000010f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1 8884 bytes
SHA-256: bbd29076ebd575cdc0c3e06058ade90b55742eb4769323dfe12a30fcb5de15a3
font_01_sfnt_off00004597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4597 19232 bytes
SHA-256: 781ce1917a4e9608f2367fcc1b14b8942580789febec60abaf40bad98f6265c0
font_02_sfnt_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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