Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54667b1e57ee291…

MALICIOUS

PDF

48.9 KB Created: 2020-10-25 17:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d131d68781da10f6a6ee4e16882be631 SHA-1: da5c95e3f330b995d0a9a790716559056ee7cef9 SHA-256: b54667b1e57ee29156d656a6ce8fd78fefef06552493ec97e629c7f1bac27d98
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=reclaime+file+recovery+crack+downloa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f89e998dfc02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f920b909a5ff.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/1/0435/5280/0929/files/effect_of_gully_erosion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/robust_nonlinear_control_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7264/6046/files/ponti_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/zosurexazitapaxabajula.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/dovatopezomep.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/salesforce_api_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4265/2327/files/delafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6950/0309/files/xukiloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/image_8.25_elliptical_replacement_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7477/3694/files/social_science_guide_class_6_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd9cb36-41d6-4068-8493-631385eb23b5/film_star_wars_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691ea270-28ea-4e1b-a381-8538a2d20259/11649792575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e31599b-660a-423f-92d6-0633eb3c65e2/50630773866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a27c51c-9578-41c6-89a7-0f830f818a20/nivedopibuvexirogato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4522/2062/files/apta_guidelines_for_student_supervision.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0020/0867/files/download_traffic_racer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1247/1962/files/whatsapp_backup_from_android_to_iphone_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/nvs_ldc_syllabus_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9808/8628/files/pilot_flying_handbook_faa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 5312 bytes
SHA-256: 7d9f864d38c6206bbd5e81c0b9f3b3bc91670d916f93c3541e17df88b99a2b5d
font_01_sfnt_off000077bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BD 12620 bytes
SHA-256: e544f0066f11ddeb826c31f10ec174c5d3e0d97dc693218d8418433671d39916
font_02_sfnt_off0000a117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA117 16160 bytes
SHA-256: 31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462

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