Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6dc7d23ff44778…

MALICIOUS

PDF

57.6 KB Created: 2020-07-26 10:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f4dc238690bd4f3d6928260fc2a1b31 SHA-1: e0e3913e2f18e93daf64a5e3ae65caf48b3f9a85 SHA-256: 3e6dc7d23ff44778df3dbda81eb2f4c0434fc8d2f547246f36d2874ffe639c81
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell T1059.003 Windows Command Shell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body is heavily obfuscated, but the heuristics indicate a link farm designed to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body did not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 https://ttraff.cc/pify?keyword=large+format+camera+movies
    • http://files.nortmilkendigital.com/uploads/1/3/0/8/130815726/nitotuvoviwipirotito.pdf
    • http://files.steelxstone.com/uploads/1/3/2/8/132815220/e9b58ba379c61ff.pdf
    • http://files.karenrobinsondance.net/uploads/1/3/0/9/130969800/16dec8ee.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/79666399372.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/nubibexegufisulesewovip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/jurigazuxumodunilosesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/24973304058.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/71393538607.pdf
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/90326117745.pdf
    • https://cdn.shopify.com/s/files/1/0440/5470/8389/files/90285904842.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/pagox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/74105315617.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/78050345398.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/desezexazujesatogev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/bezolesomipomarokuwurada.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5dd.bin
dd0993d58d8cf1865b5a2d356ea89edb65d883c5af1c5b40900036cfc222a332		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DD 4852 bytes
font_01_sfnt_off0000b669.bin
9f7a766ffd7db7de75c06ec8c0cff9da91e62c3cf80d64a2c82d2022a51c93cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB669 10208 bytes

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