Malicious PDF — malware analysis report

Static analysis result for SHA-256 456ec692e9e5d1a3…

MALICIOUS

PDF

41.4 KB Created: 2020-10-01 03:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 955453b1755747d36fa63f17b679feea SHA-1: cf8edcea814f02082d11941e779eee3fdc6df46a SHA-256: 456ec692e9e5d1a3efa6657c352adf5a19d7ae73f379d668c7bdc08a79705557
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body itself contains the malicious URL and other benign-looking PDF links, likely to obscure the malicious intent.

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://cctraff.ru/strik?keyword=analytic+islamic+philosophy+pdf In PDF document text
    • http://files.projectdiana-eme.com/uploads/1/3/1/6/131637316/58fe6a594908.pdfIn PDF document text
    • http://motik.codydeaner.com/uploads/1/3/1/0/131070420/edf2f1c9.pdfIn PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/nivizuverewudo.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/resemoji.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/jenajuxivuvuvinevil.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/gekeruwulotovorosokaxifed.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/44508073995.pdfIn PDF document text
    • https://site-1037103.mozfiles.com/files/1037103/12200636353.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/rebarufin.pdfIn PDF document text
    • https://site-1039804.mozfiles.com/files/1039804/74923817081.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/1/0438/4541/9173/files/42226379731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7847/0817/files/wobepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/gibbon_la_caida_del_imperio_romano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/maru_bessie_head.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/91771509263.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_off00006128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 5392 bytes
SHA-256: a66c8c2240c7e21812287327c01a149175071e42a96edb6d1029f7e5da14e2a2
font_01_sfnt_off00007368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 10924 bytes
SHA-256: 6b72d87adbe59fddbf92145b47d00050f64e2881f3af44bdadfde3cce61edc53

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