Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8dae8479b6d756…

MALICIOUS

PDF

34.6 KB Created: 2020-08-30 01:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce8c6115192569f35beaf87c7017c28 SHA-1: 310f38c1382b726a3a4e01a6a2b33b181354e296 SHA-256: 0c8dae8479b6d756bf23648630392edb9707df7d2bbb7f4aecaba366ffe9bf7f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a Samsung printer manual and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic.

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=samsung+ml+2165w+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/45658312677.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/83750085890.pdf
    • https://cdn.shopify.com/s/files/1/0443/8809/0022/files/auditor_report_format_for_llp.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/xalomadofagovoropik.pdf
    • https://static.usrfiles.com/ugd/4b68be_c1afc19fd703461dabb3188fcd6149f6.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/mopijenowajixepiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/73920133716.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/bookdown_authoring_books_and_technical_documents_with_r_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/skater_boy_avril_lavigne.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_off00004941.bin
ff1b473ccee1098588561cf72281dd084ad0f8a11f33c7534c7b7b940c4dc227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4941 5568 bytes
font_01_sfnt_off00005c40.bin
651cbeb4ec688369e948dcc6af3c86b3ce6aef63586e043fa0b90531e0f19bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 10096 bytes

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