Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6179f75c8490c4f…

MALICIOUS

PDF

39.0 KB Created: 2020-10-27 16:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 04c6dbe05563838f32e7f49c5895dadd SHA-1: 4b2e2874893ac33054cc11e1a5874adb8277a33c SHA-256: f6179f75c8490c4f50a6fa185f93b94bbfcdea9f4fb71605c0b30ff451a7b0e5
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://ggtraff.ru/strik?keyword=candy+cane+lane+woodland+hills+address'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are likely part of a SEO-based distribution scheme. The ML classifier also strongly flagged this PDF as malicious. These factors indicate the document's primary purpose is to lure users to a malicious site.

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://ggtraff.ru/strik?keyword=candy+cane+lane+woodland+hills+address In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8748c7abbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f91110877b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f87c33b30d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f930c8236783.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5036761.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/kufewirerukitumew.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/toripujo.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/pezof_dosugevefomoso_furom_gabugosojonet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/th_digraph_worksheet_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5129/4376/files/the_patriot_movie_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/4th_grade_multiplying_and_dividing_decimals_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3028/0864/files/solomon_elementary_school_plains_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/exercice_corrig_distillation_rectification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3374/1480/files/35885462786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/fijapot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0642/5760/files/dsm_5_neurodevelopmental_disorders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8855/3131/files/kdl-40r510c_power_supply.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9797/2629/files/era_o_dito_marcelino_freire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9965/9681/files/terekemipuzitugeto.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/transformar_em_dwg_autocad_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tuvodokako.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/9138008095.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/multiplication_worksheets_year_4.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_off000059cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CF 5128 bytes
SHA-256: 4365f84b12f1432178fb10429750143ae29cfb677da1a8c1a63faec2e2cac373
font_01_sfnt_off00006b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 10372 bytes
SHA-256: 5146d6f32bfd3b4a641d24c5efd1ca07cf1d54bf5f2e1986fff7449b01357730

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