Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae7f2c19c0b6bdc…

MALICIOUS

PDF

43.8 KB Created: 2020-11-04 12:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 77ebcba65595592565331d1eb86966ac SHA-1: 9fface88628f9cdb77859b8a0e6e915f6db4aee3 SHA-256: 7ae7f2c19c0b6bdcef37b664cbb0d07ed54bd45a83d4c26250ebd028a5a89ebf
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, masquerading as a movie streaming service. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware or phish users. The presence of embedded URLs and the redirection to a suspicious domain are key indicators of malicious intent.

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=watch+superbad+full+movie+putlockers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f8ff40511936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5f9d213be70fe.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/1507003.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/timive-ludugazeb-begakiwa.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/5488874.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/taforekatelov_rememoraxit_kebilumew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f86f516230e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5f99357d67b55.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/fosagoba/easy_violin_and_cello_duets.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/42414021523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e913fd-2dad-483f-8294-d6cbbff9e71e/koguw.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/redikevetotimawoxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8818/9869/files/bmcc_english_101_final_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7398/4413/files/internet_free_games_for_android.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_off00006b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B82 5672 bytes
SHA-256: a2ead72d266370429510d97c3908023f290867b49cb26f55a41f9cd3fcc8d998
font_01_sfnt_off00007eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAE 10604 bytes
SHA-256: 19865289688f86f79b697e2e760be3920256be252f06a02c973984f26f3285d6

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