Malicious PDF — malware analysis report

Static analysis result for SHA-256 50359f1572d4b2e0…

MALICIOUS

PDF

46.4 KB Created: 2020-10-28 23:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7ded9fbd6b052f0487c71d093eee8aec SHA-1: e7187dcfe4a3cb08545f85770df55456d60165d7 SHA-256: 50359f1572d4b2e0ff70444c075354ca642ccb7c31f19b0f018d4e5a4f654fed
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 large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to distribute malware. One of the primary links, 'https://ttraff.cc/123?keyword=la+epoca+medieval+caracteristicas', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious infrastructure, likely as part of a phishing or malware distribution campaign.

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.cc/123?keyword=la+epoca+medieval+caracteristicas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8b7ea6b8e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f8e55c41ad2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87d5db3d066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f886b6b21541.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://uploads.strikinglycdn.com/files/3ccd0792-b723-412e-b40f-02a5eb27b35d/93868663269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0101/1102/files/tuba_city_az_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/impulsive_premeditated_aggression_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b079e0-e758-4449-8705-b6ebb46868fc/kenshi_custom_start.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/cafe_extrablatt_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/todeserif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3394/9875/files/heart_healthy_guide_to_eating_out.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/zotikin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/5700799052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8409/3884/files/balancing_equations_worksheet_year_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_cask_of_amontillado_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245f0b9c-62b7-4b78-b016-a0a6d5b9cc4e/the_elements_of_graphic_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2019/8559/files/borolurefazipenekoruvuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/types_of_intents_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/luxipifixedatiraxabar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/stream_hunger_games_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0e39ec-420c-4b92-b4c9-df52f9cb683d/23734631650.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_off00006a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 4904 bytes
SHA-256: f8da95f42b2ec0703e6a8cfd966778f92b56cfa3c3625ad790d0af8a8b89ceb1
font_01_sfnt_off00007b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B47 10240 bytes
SHA-256: 6d6c3c5032bcbe5fff38cfa5bb149d7adcb8dfcc0de3f23f11830986d148ede5
font_02_sfnt_off00009e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E27 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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