Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe2e9e8f1e69a6d…

MALICIOUS

PDF

47.2 KB Created: 2020-10-29 03:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bb379a01f71a8a8025936b6e5c17da5c SHA-1: b04722a7cb5172bb7fc02928a043ce483680e2db SHA-256: 0fe2e9e8f1e69a6d116fb98bf456c57ac813acf2a921fe77079114cf19305522
124 Risk Score

Malware Insights

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

The PDF document contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=de+broglie+wavelength+formula+in+terms+of+energy'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise the malicious destination. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's a redirector link and part of a link farm on disposable hosting.

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 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://cctraff.ru/strik?keyword=de+broglie+wavelength+formula+in+terms+of+energy In PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/8125111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f893867d9c9d.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/4472734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f8da5811cfa6.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/ec6cba7733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f883ddf20f58.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/8860017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5f9057870d8d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f932f84b7c60.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/69d3c0d1-57a4-47a1-ba30-be9fe4796e84/nexido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9844/7778/files/crash_course_world_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95bde19-5dbd-40a1-aa06-ce38b9ba1232/download_frozen_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/carboxylic_acid_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1750b97-7d52-4d0c-8c2a-8e498cca0009/88109230719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037cc94b-d1d4-48c0-8530-065a90a03fde/vixoviwuvabovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9406/3269/files/mujutorobobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/enamoured_giana_darling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6490/0763/files/61686566032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaf1921-6731-4c3f-a4f2-d2699e214ee4/jatabadivenajevuzevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5642/5879/files/watch_joker_full_movie_online_free_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d97818-844b-4d2c-9c69-0772ff1fa520/que_es_la_electricidad_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/22220668477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744f4382-61a3-48d0-a557-98fc1c75fa78/sea_dogs_to_each_his_own_mods.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_off00007222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7222 5576 bytes
SHA-256: 3db6ebe0db9dbca0901234ad1278adb07ab14d1815c9c5c34f07314bf9481828
font_01_sfnt_off0000850f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850F 12092 bytes
SHA-256: 093ba7bdd7b859a9312ed9bdb7f44ae2af3dd0f85ab4dd2881935a325454df33