Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f68b220eefd3c7…

MALICIOUS

PDF

41.3 KB Created: 2020-10-10 11:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0bf6dbd6ddc06caa9133ae68b24e8fde SHA-1: a2e646408b4f2b003e5313520a1072b29eb16805 SHA-256: 86f68b220eefd3c7f147c319717768d421fe7867857984e624e3d35c11f0dd25
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=barbie+of+swan+lake+trailer In PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/72115500091.pdfIn PDF document text
    • https://site-1044184.mozfiles.com/files/1044184/jaragegupasaxe.pdfIn PDF document text
    • https://site-1041611.mozfiles.com/files/1041611/kovetode.pdfIn PDF document text
    • https://site-1038605.mozfiles.com/files/1038605/92570751003.pdfIn PDF document text
    • https://site-1039848.mozfiles.com/files/1039848/lubumajufek.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/64094023727.pdfIn PDF document text
    • https://site-1042883.mozfiles.com/files/1042883/zosuzavesapivufu.pdfIn PDF document text
    • https://site-1041942.mozfiles.com/files/1041942/nininorexuwatifu.pdfIn PDF document text
    • https://site-1040388.mozfiles.com/files/1040388/wogog.pdfIn PDF document text
    • http://files.worldscreenculture.tv/uploads/1/3/1/3/131383949/kojosikogubonufepu.pdfIn PDF document text
    • http://files.karenjanssen.net/uploads/1/3/1/3/131379856/922342d.pdfIn PDF document text
    • http://xasafutif.nspaintingservices.com/uploads/1/3/1/8/131856040/34d81e77e7e4b1.pdfIn PDF document text
    • http://galoka.pampanga-properties.com/uploads/1/3/1/4/131453329/91434.pdfIn PDF document text
    • http://maravifo.sassyarabia.com/uploads/1/3/0/8/130874426/2567911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/triumph_property_management_nyc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/fegogaginobif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/getaradube.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_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 5108 bytes
SHA-256: f0fe8f714b328cda8bb8e83c139c1c7b3f119537bd1e1cb58aca2e65b5749d33
font_01_sfnt_off0000741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 10472 bytes
SHA-256: 1dd6981caecb7aa58232ce5b1cec036a67fcd57b43692c45241ad14201d359c4

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