Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e6c85182331d9a…

MALICIOUS

PDF

105.3 KB Created: 2020-07-10 02:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b32bf06cfc0ef9c23ece3cd82cf244 SHA-1: f8f0d88ef9ccfdbe0d07e4db041a07081e366fcc SHA-256: 66e6c85182331d9ad87aba4cd6f86bf91ad76dc5d8f3a64dd0a261f26779d96a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains keywords related to 'Herbalife business plan' and a URL that appears to be part of a redirection scheme. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wb?keyword=herbalife%20business%20plan%202019%20pdf
    • http://files.millomrufc.com/uploads/1/3/1/4/131454496/2ac9c0daa57b0b.pdf
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • http://files.jewelrybydmumit.com/uploads/1/3/1/6/131636866/6690451.pdf
    • http://files.ourladyofthebays.org/uploads/1/3/1/3/131379290/tugixoti_zixejuzivo_dazivalogo_zuvidufelugukav.pdf
    • http://files.invernessvineyard.org/uploads/1/3/0/7/130775138/5049674.pdf
    • http://files.bowcreekkennels.com/uploads/1/3/0/7/130739120/2874723.pdf
    • http://files.ipinternal.com/uploads/1/3/1/4/131437753/pilefege-kafifekunixovod-nixapefaseterof.pdf
    • http://files.rosevillepoolcare.com/uploads/1/3/1/8/131872198/lamamumobaseviv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xosuvenivon.files.wordpress.com/2020/07/30456526902.pdf
    • https://kedojisap.files.wordpress.com/2020/06/53937137810.pdf
    • https://bujadite.files.wordpress.com/2020/07/gomopotijifafuzadowazule.pdf
    • https://senodakezol.files.wordpress.com/2020/06/23056848225.pdf
    • https://xuragepasob.files.wordpress.com/2020/07/48832710975.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37629755229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.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_off00016183.bin
064170a474bc88334af2ecbf765bd1940e5f321cf5c0e5401e71544c7e1b1d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16183 5308 bytes
font_01_sfnt_off0001737c.bin
07d78afd77040c3ab3f1bde9f13fb9475bb4aa03038065163ed44c2e13b1d1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1737C 10816 bytes

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