Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af0d1757e4f3de1…

MALICIOUS

PDF

38.3 KB Created: 2020-09-05 06:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93d19d70a9e45e66f8dbf58e1e3ffed6 SHA-1: 59cd6f72efb8b7d76490a0313ce2928617a503a1 SHA-256: 5af0d1757e4f3de11fae615ebcd7b8cb15445ccf9c659c8ffd7383d659089a86
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to benign Shopify URLs but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise malicious activity as educational content. The primary purpose appears to be driving traffic to the malicious redirector for further exploitation or SEO poisoning.

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.club/wix?keyword=area+of+rectangle+worksheet+5th+grade
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/medscape_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/bond_refund_form_nz_tenancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/affairscloud_pocket_pdf_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_862d9bd862424744ab91a126a00b84fc.pdf
    • https://static.usrfiles.com/ugd/5ecadc_58b0a47c65fb4b51a2688b3e8e1e92d9.pdf
    • https://static.usrfiles.com/ugd/8acad3_95a690beb6844341954035d5ba50d138.pdf
    • https://static.usrfiles.com/ugd/b148e5_92451dcb780e4d26a640616b6a07750e.pdf
    • https://static.usrfiles.com/ugd/b8c837_39f0f66d1d6e4fa6876cafb002f957c2.pdf
    • https://static.usrfiles.com/ugd/23b571_2bbeb732e37742b4895d748fd6344415.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_off0000571a.bin
b51f401841f936f0e6149bee4009985a8e7fa8e5610428f8aa0d1fa567bcfe99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571A 5552 bytes
font_01_sfnt_off00006a0d.bin
06e459e2586b1a25ca378bb96d38a437b971d8ac8fe2ca698f996240111c8e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 10192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.