Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb07d7ce8cf9aea0…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 21:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 693cb6c6197d369ddd5879661891ec0b SHA-1: 70cef9e2f6b05ce1807ed751842dba262488a92e SHA-256: fb07d7ce8cf9aea06cf41c64428da76db131723249776c1ec9b199362f919f17
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, with a primary link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting a phishing or scam attempt disguised as educational material. The ML classifier strongly indicates maliciousness.

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.link/pify?keyword=roman+numerals+worksheet+grade+4 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/defdb4_ed8f948626954a6c8166ceac3742ea34.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c92885005f1e4e63921941a4326e60d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c618e9_ffada202ffd34c45875f790b9ce24fb6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eed56f_ab7ddc3f954c4e6cb8fd18130b958bde.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/38bf1f_ae1c0be040264081a92d5f528debb1a0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c836c3_de58292a867f4c32b2c1c2238717735f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2add61c2764c44468a3083442cb4b740.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/314c35_789dcf15e89c46989db78f824fcfe07b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fb642f2e8f87472d92571b067a601cef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f16bd_d3686640b3dd40a0b6a2873e1857ddb5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_93df851ba33a428ba21dde46959a3e73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dca248b2fdd34075aa563d43fe792528.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_52a3f6e458934f6bbd5791377daf2487.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 5488 bytes
SHA-256: 149a9966ea8e136ca4dc4acbbb2fc3624625a4bfa660316e5a7f5019701cc0d6
font_01_sfnt_off00007c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 10192 bytes
SHA-256: fc1b92d52f674c6872efbb08a6fd7f7e0aef189ee658a87192ac22a53dd3f8c0

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