Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d33c0db4586b9a8…

MALICIOUS

PDF

41.6 KB Created: 2020-09-02 15:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28aef69346d81acb138ff69434a3e529 SHA-1: 9c92b5d4035e40a32582d7a10cdc8bdd86837e2b SHA-256: 0d33c0db4586b9a883f6b3f2111407b0f73e09aa500b69f8ece2053f1f61396e
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded content, though obfuscated, includes the malicious URL, suggesting an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL is a high-confidence indicator of malicious intent.

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.
  • 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=similarity+report+what+is+acceptable
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/canva_photo_editor_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0463/0803/2669/files/90962840947.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/gosavofakatorelijusolix.pdf
    • https://static.usrfiles.com/ugd/b8c837_04244193227144738393786ac1a82aa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_59de6ac12912479a83686689179d656e.pdf
    • https://static.usrfiles.com/ugd/b8c837_91d5ddeebfda4382b23fdbc4a41c7da7.pdf
    • https://static.usrfiles.com/ugd/fac845_253232ee4bc8448a9ff664bf1f67dea5.pdf
    • https://static.usrfiles.com/ugd/e1c37d_cefdb84b50614d46b7b1dd546937bbe9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f3e3d5a9e3433186ffa68aeeea68e6.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_off000063b7.bin
99b2670876fa34b8e8489e4f45134f987a7c4f4e014f96c276028e8ea84dc7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B7 5608 bytes
font_01_sfnt_off000076af.bin
ae506ecfb1391ac810f54d874c4c787ff7d67129a8ef43c75345dcdc0e7ac1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AF 10456 bytes

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