Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbe267c5c64bd54…

MALICIOUS

PDF

44.2 KB Created: 2020-08-23 21:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3e74c8ce5a4344718af9c414b9ff29 SHA-1: 1d95c3ccf41af1c2c2bf6ff61aadc1f949e8cb56 SHA-256: cfbe267c5c64bd546a5f4c9e7135ccd2fe0751796260eef166c0b4bedba15a05
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to lure users into clicking on what appears to be a product data sheet. The primary link, 'https://ttraff.ru/pify?keyword=zrc+cold+galvanizing+compound+product+data+sheet', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=zrc+cold+galvanizing+compound+product+data+sheet
    • http://files.superstudents408.com/uploads/1/3/2/8/132814589/b2a10b0.pdf
    • http://gebom.rockbottomtv.com/uploads/1/3/0/7/130775971/5208535.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/daraxutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/wakisagu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/sample_applied_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9587/files/mekinubinabusav.pdf
    • https://cdn.shopify.com/s/files/1/0449/7352/3112/files/annual_general_meeting.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6789/files/mechanical_piping_drawing_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/academic_performance_of_students_with_hearing_impairment.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/vin_report_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/xoraponatimolanavavizinip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/52970285131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cc.bin
e1b2b94fb5d89f54dfc4543367707aa017af1288a778f58d731b35da7dba4a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 5556 bytes
font_01_sfnt_off0000748e.bin
ebb61956b54bc1721b35a39e77a918ee9592f7126b40c88a4954227007179a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 14484 bytes

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