Malicious PDF — malware analysis report

Static analysis result for SHA-256 6003a094cf8dfc2a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-29 09:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 079bc698bb137aa5a04e1e70294f22f4 SHA-1: 33bd11f4ef5b3e88e3f31a8bb7558de4f297cf02 SHA-256: 6003a094cf8dfc2a47db6e9e5ee63d8ca3f6c6c12ebe55b67e12ed2f9e1788b0
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, masquerading as a software download. This is further supported by heuristics indicating the PDF is a redirector and part of a link farm. The ML classifier also strongly flagged this PDF as malicious. The embedded link is designed to trick users into visiting potentially harmful sites.

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/wix?keyword=driverpack+offline+download+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bf34964ee53040f0ae4f55e428970441.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e8a88e7e51e4582ac51e7d219dc9ab9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f721d03694f1425494fa6545c4b64ef2.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/76045733295.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5121/files/gugawizevo.pdf
    • https://static.usrfiles.com/ugd/b8c837_13281f00f0d746fb824f14a438d82bfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f13a905ecaf43fab28eb0a4a827fa9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_decc3acde8e745f49dd151d6a3a7a0a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f8faf09562a4f0f85a6dca7b8124fce.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a06a31749b4e9e8983b609aa762230.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_off00005ec5.bin
f692ead23d65266625e8e71fc6b9677b874bdb84ea6186de5af3dc0ab0e9a0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC5 5556 bytes
font_01_sfnt_off000071e0.bin
f4be448f4a3019bea6a46e87d1979c4c0f5a3eb58e0e7e9b7e4258ab53c92a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 10924 bytes

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