Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b14d2f80fba1476…

MALICIOUS

PDF

44.4 KB Created: 2020-10-31 18:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7d5f6e29a25765b43a1fb5cded0f7ad3 SHA-1: 3440d0b54fdda51ab65e585647406cf7a49d8e81 SHA-256: 2b14d2f80fba147605cd49f4ceebd5a58f5a4c37d8dca9bbb19b56e79ad08834
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 critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=alien+streams+not+working'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links. The ML classifier also strongly flagged this document as malicious. These indicators suggest the document's primary purpose is to lure users to malicious infrastructure.

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://cctraff.ru/123?keyword=alien+streams+not+working In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8b9631f177a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5f93c0ca5b8be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/visual_perception_figure_ground_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0166/4433/files/56922383745.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/92890734647.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/brain_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b93e5d1-c2fb-451e-b247-3ee055f77972/naveve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2074fa80-14a0-42d3-9738-7693647d590b/nuxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c66c8ab-669c-4e96-9b0e-3a1377e79b88/95829922664.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/barixunesawaturiwafumeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3519/6067/files/creative_low_organized_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7437b9b8-d2a1-4f78-8eec-b956d802817f/66443554426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae777ae-7b26-4ac5-8bac-f8e28ec266a2/76419003276.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 4940 bytes
SHA-256: 1d8768de0a94e8560290975368a5bf469e3e681bbb14a73b8fb43ea79c0ce1cd
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10980 bytes
SHA-256: b1a45f74e0c7c187079219dac2cc47c2d6aa72f0c3d7ce82e2bd4905b89b352c
font_02_sfnt_off00009733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9733 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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