Malicious PDF — malware analysis report

Static analysis result for SHA-256 a510df2f2bce00ae…

MALICIOUS

PDF

420.0 KB Created: 2020-10-07 15:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b3f97efd1f59c85f9a4348ff85f201ea SHA-1: 9a750b943aa8a63dd8f27c4af7a81d70ac81854f SHA-256: a510df2f2bce00aeab498f2e86156712dcb6c1d58ea18c8ac7e2ccc4c9c54b47
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/strik?keyword=ignacio+warleta+alcina++isla` is the primary indicator of malicious intent, likely serving as a lure for further compromise. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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.
  • 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://cctraff.ru/strik?keyword=ignacio+warleta+alcina++isla In PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/22413081206.pdfIn PDF document text
    • https://site-1044312.mozfiles.com/files/1044312/2586761811.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/xigisawogobovirepimef.pdfIn PDF document text
    • https://site-1038951.mozfiles.com/files/1038951/46106322243.pdfIn PDF document text
    • https://site-1039438.mozfiles.com/files/1039438/winetun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef1b6f1-821c-4583-94a2-5909772144d0/tanutoxobax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f322fb-5552-4eab-b013-7a0724a67f91/99296854690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b5a776-ade5-42ad-924c-6cf6f0bcc673/wikasikutamunezixobaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d038268b-bc4a-42f0-be54-bfe66a1722a8/jemumukokawaduzadujufogis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2669cd-2908-4f66-946e-df1dd847d0d3/futogulokinasatap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6744/0294/files/departamentos_de_colombia_lista.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/fozupez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/81394827055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/reflux_organic_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/73536173422.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_off00064c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1B 4996 bytes
SHA-256: f355d345be391d0a174bb2e8ab62080a68279606c47372d66c4ccc7844551df9
font_01_sfnt_off00065d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3B 10136 bytes
SHA-256: de249186cde98163b0034aa926ec4e525c03ea2f82ec30f130445d78730f436d

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