Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0b32073f0ddf60…

MALICIOUS

PDF

38.2 KB Created: 2020-11-03 21:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2a726aea6bb62b7d49d5e9cb1e398127 SHA-1: 2bb7ed9d6dc69df15c783678eea649f87ebcef8d SHA-256: de0b32073f0ddf6084e30c7e9ce40634d95567f3f9c4da05af234b13069f596e
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 heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL and a large number of other PDF links, suggesting a link farm or redirection attempt. The ML classifier also strongly indicated maliciousness.

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://ttraff.me/123?keyword=glock+18+airsoft+skins In PDF document text
    • https://modatubegawaso.weebly.com/uploads/1/3/4/4/134491319/pafutaxutake.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/vonugumazagusu.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/35849aad-3ff9-4ddb-96e5-a301a53f6894/bakigedifuzaganarepufiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ef9757-54c9-4432-bc56-1987bd1a15b6/jungle_biome_minecraft_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0321644f-a99f-420b-9b03-7bbd5501eb5d/19220205684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd2ec2f-4e02-4311-bd4d-9b3e007136ea/gajerepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/pebenabezek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e8c406-8d59-4a72-9bea-42e72d7e759b/imperatif_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/5208146405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f4ef72-e2ea-4439-9f92-9ab2d8107db7/st_dorothy_glendora.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/word_processing_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/kawapogexajewe.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/nunijitav.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/zafudakemag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f34113-81b8-43a1-8c42-a150b1c56372/pizza_delivery_driver_insurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2440/7471/files/diccionario_biblico_teologico_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999d074d-dbe2-475c-bc5c-64f967eaa254/vunak.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_off000055f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F0 5216 bytes
SHA-256: c50cd937648024502ed1668afdf11c71fc5fd853dd68b4735e07017b8f6c6d00
font_01_sfnt_off000067ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 10780 bytes
SHA-256: 41fffa4c1ac2a7008514f9aa9c28bc8bc83ef28a37f225b1fe35f4d5643b3485

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