Malicious PDF — malware analysis report

Static analysis result for SHA-256 5904b4ba41ba03d2…

MALICIOUS

PDF

56.8 KB Created: 2020-10-25 22:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 51c735d1880246e794acb13f0a61c29c SHA-1: c8422272a735c172380729e2b6b771bb98c401ca SHA-256: 5904b4ba41ba03d2a263cc0422ab96e00996225393cc5550fc77e9136d8b6cef
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/123?keyword=adjective+order+%25E0%25B9%2581%25E0%25B8%259A%25E0%25B8%259A%25E0%25B8%259D%25E0%25B8%25B6%25E0%25B8%2581%25E0%25B8%25AB%25E0%25B8%25B1%25E0%25B8%2594+%25E0%25B8%259E%25E0%25B8%25A3%25E0%25B9%2589%25E0%25B8%25AD%25E0%25B8%25A1%25E0%25B9%2580%25E0%25B8%2589%25E0%25B8%25A5%25E0%25B8%25A2+pdf In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zuram.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/gabemiz.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/wepupumalixetipu.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/fipet_dekomejuw_vijurom_zoxojulevesi.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/904093bb9864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f91333871505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f930aac728cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f94f72d44e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f8b97bca9be5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f904e9aa8b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_5f9585760f10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8f050d8b40d.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8851/8562/files/12706164717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/static_x_start_a_war_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/analysis_of_vinegar_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6664/4384/files/descargar_apk_facebook_lite_actualizado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1260/4582/files/retafokobujafilipazudid.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/nitulirowegumoxunejado.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/score_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad22d76f-158b-47c0-b198-c7c51df34c2b/23367419146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e21e907-5a90-4af3-906c-51f6ac2f8ffa/2927233117.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000084ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x84AB 17116 bytes
SHA-256: 37a33d25680044d1b04d1ab94bfad037f0f3d57493214a9a5f9c6f9ffbffe057
font_00_sfnt_off00005c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C14 4852 bytes
SHA-256: 496b3badad0bb59c90c1d5369278ca15f17fa85fb5df621e0a4a92df1b9c3bd3
font_01_sfnt_off00006ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 9048 bytes
SHA-256: 2d216adf3fd683ce217c10914317d1dccd76d6eeb4d7040f31bb3a35be03f0a5
font_03_sfnt_off0000b2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CF 8768 bytes
SHA-256: 9eed0c9b8c858665f354464b734c9e559e7934ff1e91a792fd5ec325fe131ac4