Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6edfa59465482fb…

MALICIOUS

PDF

46.8 KB Created: 2020-10-06 15:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3fe9cf469569b08f677888eb10930b41 SHA-1: 90b12f57d650bb49f918f241dd44eca427109972 SHA-256: b6edfa59465482fb22e9bd5c6d07d554f7e5893f7748607c6a8c4c2e93cd5c53
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a prominent link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the document is part of a link farm, suggesting a tactic to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector that likely serves as a gateway to further malicious content or phishing pages.

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=mapa+euroasi%25C3%25A1tico+con+nombres In PDF document text
    • http://juxamerut.artsmissco.org/uploads/1/3/1/4/131408791/dilew.pdfIn PDF document text
    • http://files.aineedwardsconsultancy.com/uploads/1/3/0/9/130969993/noxewexamezipel_rowoparas.pdfIn PDF document text
    • http://files.struggleformodernturkey.com/uploads/1/3/1/8/131856009/jelowizojewafekejulu.pdfIn PDF document text
    • http://files.frenchpeakwines.com/uploads/1/3/2/6/132682530/7547985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/bates_clinical_examination.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/98193299105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7105/7319/files/71971971811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/com_zombies_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8229/4455/files/75192355984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412f2796-a6a8-46be-8fa3-bced5c92aad6/12010683963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876a1135-20bd-4627-9b82-9eeee6af7b1b/nixalaxapupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f880c10-61c3-4384-a4f8-f294371fb4fb/jagukas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1118df05-f4e3-48a7-833c-a8654fe0df48/78684144518.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C65 3312 bytes
SHA-256: cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c
font_01_sfnt_off00006846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 5428 bytes
SHA-256: 090897758ffaa0b28a189f100de744eb3eb744300b7038b1436b286886bcdffc
font_02_sfnt_off00007a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1D 11928 bytes
SHA-256: 31ed5ed9a70fa91b36da94c34fa88e02cfdf7fb2a798b4a16f85d095a84196b6
font_03_sfnt_off0000a098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA098 2752 bytes
SHA-256: e68b24175d5971d76b4c28d2c0db5c95ec99c51429de742704ab5baffc55f2f0

Open this report in the interactive analyzer, or submit your own file for analysis.