Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f7fcae3b32355e…

MALICIOUS

PDF

45.4 KB Created: 2020-11-04 14:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f3b24cbe3b02b02198092725437eae3c SHA-1: 749902ba589f00dff74fde38486adbe8722208fc SHA-256: 15f7fcae3b32355e0a5acb82cd9243d54ee82d4fc1ed3b2e024ff39b3a370779
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a PDF redirector link to known malicious infrastructure. Another critical heuristic flags it as a PDF SEO link farm, indicating an attempt to manipulate search results and drive traffic to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to malicious domains.

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=unblocked+games+345 In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/baa98.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/zegimefoj.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/godumigone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f89bbdfc07a8.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/zetare/pazetowelububiwinebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0564a25e-5b11-4d2c-b1bb-0bc7f068c295/this_is_where_it_ends_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/noxijasedomepeluzegil.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/ap_language_and_composition_exam_essays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4082f5-b0e3-47dc-8375-dae1864d7f77/it_takes_a_village_hillary_clinton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea5d8dc-4610-44aa-bc07-2db9a73e26fe/93579813030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6879e7-8134-43d2-a8f4-2e245fb7b5d9/87646682224.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/manual_practico_de_acupuntura_auricular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9940895a-05b6-4047-bbfa-cf8ddf7fb26e/82014024339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d811921c-b100-4e22-b257-f0255473c4f8/congruent_shapes_worksheets_for_firs.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_off0000710f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 5736 bytes
SHA-256: 18356f3e4eb3f8e4c51eb6ad96aec580238828284e2b49a574b348c1a5c4955f
font_01_sfnt_off00008496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 10640 bytes
SHA-256: d90f8150fc1e6936aff8bd115b2bf257504f9f35f3a1f5dca88d766ca78851c5

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