Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17692cd84b59e53…

MALICIOUS

PDF

40.8 KB Created: 2020-10-05 10:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d10b1bf9088f73c6432f701be585c6b SHA-1: 640c1bd29eb34bc91e4680257561ce412e7bce79 SHA-256: e17692cd84b59e532a828833b6a28aa207c4f8be3c29ec26d5e9aba6daf772f9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/strik?keyword=of+the+father%2527+s+love+begotten', is flagged as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly supports the malicious nature of this PDF.

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=of+the+father%2527+s+love+begotten In PDF document text
    • http://files.elevatedmediamarketing.com/uploads/1/3/1/8/131856995/mibevagugu.pdfIn PDF document text
    • http://files.euroatlantic-group.com/uploads/1/3/0/7/130738887/balufejaf.pdfIn PDF document text
    • http://files.lewiswarburg.com/uploads/1/3/0/7/130775195/xanirexize.pdfIn PDF document text
    • http://dukajuvun.bcwine.ca/uploads/1/3/2/6/132680831/603076.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/e677d76c-d2ff-4e84-8b2b-d534bbfb7ed3/99971926015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa47ac2a-3a37-40d3-9ea4-bd1af61d0960/nixubovibosexovavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17642d99-a183-41c4-a8e6-14d7419dc905/wijefukef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0886/0575/files/disciplines_of_a_godly_man_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6d407f-7bab-4a60-930b-3a0d25b74251/36048390789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037e3120-364a-4cfb-b500-1a5482b1a03b/53951626998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c7f1cd-f356-4dbd-a3cf-31d4b0b6f160/97831109181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd44874-12ce-4185-95cc-3844cc6000bf/mijuxiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aeb22bf-501d-4cde-bc68-be00b46eb9c7/disulojutalole.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_off00006280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 5292 bytes
SHA-256: 65f9b58c41644d940fe14f3d8d44886475993804840ddf123bcccc43fa328c80
font_01_sfnt_off0000748a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 9924 bytes
SHA-256: 1e15d2476d9300341e9bd2c4b7b4274694807e80a63060804f4210164cd3e191

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