Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa948ad537d57176…

MALICIOUS

PDF

39.6 KB Created: 2020-11-05 00:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 04b672e6537d960c92487466f552338b SHA-1: d288353830807e19a90d0ddf055c6a9144f83ba7 SHA-256: aa948ad537d5717625f95fb1f00b6325284295979650f74cc9c0f488e7b2f744
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.club/123?keyword=daisy+girl+scout+badge+requirements+pdf In PDF document text
    • https://sobepaded.weebly.com/uploads/1/3/4/3/134305425/navegusufobuwila.pdfIn PDF document text
    • https://satupagewamikim.weebly.com/uploads/1/3/4/5/134584558/9535173.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/feba63.pdfIn PDF document text
    • https://jafutefas.weebly.com/uploads/1/3/4/4/134489285/keravozakebapo.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/94f0a72fe2.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/4379734.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/esters_used_in_everyday_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bb7bba-9caf-461a-a8a1-b909005ba823/san_ramon_unified_school_district_special_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918a9c73-b398-4a2c-906d-b84671301af1/70777369717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229bf171-f0e3-462e-820a-c767fc8029bc/21085284950.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/star_wars_google_drive_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a738a0-9844-40d1-9001-67b688e22336/bisek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1195399c-a1dc-4d5f-a9cf-d0ebbfb3cf1c/answers_to_school_textbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/leviretudunojatuvezu.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_off00005cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCE 5840 bytes
SHA-256: 12b5ce6619adc8aca16c31ca7b89f896f4d8dcb986c8d35179e3bae683f6463e
font_01_sfnt_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 9752 bytes
SHA-256: aa2a8eac72ce947e36e28f5f2fe67ea1783a5d24c22302762364a0af0b031d22

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