Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e6df1d25454581…

MALICIOUS

PDF

50.8 KB Created: 2020-10-31 13:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 308450b6db444c2854fa01e59b6a0e7e SHA-1: b90fa35353460d4089f5caed159d91da1db44407 SHA-256: 59e6df1d254545812740c1eba76edf31f3765d84585efdd97980a1b8c8482375
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 large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or redirection scheme to distribute malicious content or phish users.

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://gettraff.ru/aws?keyword=formula+worksheet+chemistry In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f892273df98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f8b2a2752370.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/fd856f26-90f4-4b3f-b9c3-7c6fb8d68d7f/runuxutitobawolibawojagan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085d307d-14f0-495e-914c-7ccebad83ff9/20500344251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4812/2546/files/financial_functions_in_excel_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cacf68-9130-4c4d-bc56-a0e7b2389a57/powixijosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbeb0690-e1e3-4eb8-8ee6-42e1581ea7b2/mudaposilisojaziwafavin.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/vufodupezejel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5bbe18-d3ba-42ca-a81c-fe74c9ea8cab/python_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd3ab87-6b7c-4b52-ace5-4413ae69ec77/91368715665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35869565-c57c-41cf-a5ee-288bfa05c213/lunilejololo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2586/4120/files/dexter_season_1_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/acca_registration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5080/9516/files/apk_of_remote_play_new.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_off00008543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8543 5252 bytes
SHA-256: 83f9f62a615b395df21e2dfe788120785028da8cdf0c81ab465a97d9e286ffe8
font_01_sfnt_off00009709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 11704 bytes
SHA-256: 2129df2161b1312a04a93052d0d66b15dd49989ae14ddd6d18fb0aa95e000f72

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