Malicious PDF — malware analysis report

Static analysis result for SHA-256 15471e01c9ee13e4…

MALICIOUS

PDF

166.8 KB Created: 2020-07-30 04:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9c97b8e56b377e17e0c53f0e5824ce SHA-1: 6693daccd1bd23f1d273c58519417a5727b35a2f SHA-256: 15471e01c9ee13e42d63cb969d377a7e0503c28b62afbdff1e3ed9bf93c3d0a2
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. The embedded content appears to be obfuscated text related to a PDF document, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=ancient+cities+of+the+indus+valley+civilization+pdf
    • http://files.destinyhorses.com/uploads/1/3/0/9/130969172/kegik.pdf
    • http://files.elephanteater.org/uploads/1/3/1/4/131438629/5421357.pdf
    • http://files.tammybrideau.com/uploads/1/3/1/8/131871583/879284.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1579/7916/files/dudutut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/wegefutevulufibadufowivem.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/18524779206.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/93132158547.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/33710155583.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/molewupisuwutaxoxerojetew.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/togewufewixegidisufofoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/luwojo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7203/4718/files/58980854596.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/68535492398.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/70644621978.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024b38.bin
913062ddf94eea45701397a74b3735ccd6c8bb9b7ab9fb6bac1e590f32d21ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B38 5232 bytes
font_01_sfnt_off00025d0e.bin
0dda79ebe47ec8af31a13c39774d7d045f1e2a134ba3c14a287e2b16fbaddef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25D0E 15624 bytes

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