Malicious PDF — malware analysis report

Static analysis result for SHA-256 66450bc71b96a8bc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 11:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98ba88137bbf6bd2dfdae7da7ecaa5c SHA-1: 814e6e416ea208da30f30dfd7f6d1d1005979b5e SHA-256: 66450bc71b96a8bca50bff7e4f928c44ad1d1ad3db5a8cacccba750b6ce104d5
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body and embedded links suggest a lure related to 'free violin sheet music' which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL alongside a large number of SEO-optimized PDF links points to a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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/pify?keyword=free+violin+sheet+music.+org
    • http://files.lesliescakeroom.com/uploads/1/3/0/7/130775633/donovoku-nijuroriz.pdf
    • http://files.asaap.us/uploads/1/3/2/7/132710683/9384976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/95114282062.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/jedutoderutowezawazusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/vendor_statement_reconciliation_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/loxagawomelego.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/1742857324.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/adverse_drug_reaction_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/kujowikimexowozese.pdf
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/angularjs_directive_templateurl_conditional.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/explore_learning_ionic_bonds_gizmo_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/compare_two_excel_worksheets_for_duplicates.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/38473055234.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad1.bin
ac2e9d3b6472e5d0fd8a42af71adc270c6fd8489dca3df53b70345cbd1d0a5c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 4932 bytes
font_01_sfnt_off00006b77.bin
fec36b5a1cda0c4dbdfcabf2acaf69c272ae97052ff9078c3b229fbfd0e45a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 9844 bytes
font_02_sfnt_off00008d34.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D34 4324 bytes

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