Malicious PDF — malware analysis report

Static analysis result for SHA-256 04222d0193dd71a7…

MALICIOUS

PDF

47.3 KB Created: 2020-08-18 17:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5f022bf61a0cb8d08700fd68eaaefcf SHA-1: 20e950e333a808d346f69f8ac17f47699705b05a SHA-256: 04222d0193dd71a7db53cfdd34bb405115638341ed0afcdf0a43be96ef312714
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=counter+strike+1.+6+maps%2524+2000+free, which is a known malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.com/pify?keyword=counter+strike+1.+6+maps%2524+2000+free
    • http://files.schoolmastermiller.com/uploads/1/3/0/7/130775679/mirifowurijafakeg.pdf
    • http://koxabum.pearlcityliferidersrc.com/uploads/1/3/2/8/132814097/pefupujeb.pdf
    • http://files.hdskiandmanagement.com/uploads/1/3/1/1/131164488/lodabaj-zoxufiputilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0567/9528/files/concurrent_collections_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/15719452539.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/ratio_analysis_project_report_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/9363889970.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/70656190190.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3005/files/nuvijonorerifagafilud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/adobe_acrobat_reader_viewer_editor_creator_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/tepepuvupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/jelurebijofixibizakiru.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006213.bin
c8180f767033e84be721af3d1e9f9486ab10cc4a4f4e617fa2ac637699846a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 5736 bytes
font_01_sfnt_off00007591.bin
afaff3d64e09e562c81b9b1d2233e4f6c515116ef517efdd65c9b40de4e1a608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10728 bytes
font_02_sfnt_off00009a92.bin
91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A92 16332 bytes

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