Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c3bcd5c3cdcd2c…

MALICIOUS

PDF

42.7 KB Created: 2020-10-28 09:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 24ba30cbdf6de35419a8f533961d81ce SHA-1: 8f4f3b92e81971becaf2c34fb29f9b2887e3e908 SHA-256: 49c3bcd5c3cdcd2cb92612af540cc4a3c29a375a3e54bf134b8914ceb4ef926e
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 malicious redirector links, pointing to a URL that masquerades as a Toastmasters manual. The document body also contains this URL and numerous other links to PDF files hosted on Shopify and Weebly, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://gettraff.ru/123?keyword=toastmasters+competent+communicator+manual+speech+8 In PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/8105709.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/1109730.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/0c22ce7c91c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5f934f2573813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8773b91c9a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f97736d77fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f89defdbe053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f99058f129d7.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/1/0486/4324/4200/files/vekisixuzewow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6013/3529/files/pegs_and_jokers_game_boards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3282/8824/files/neural_network_projects_with_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0303/9903/files/16404173747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8823/9510/files/rogibaporarugitazazuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/anti_obesity_drugs_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8741/6475/files/black_ops_3_shadows_of_evil_beast_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/botany_books_for_bsc_first_year.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/rejuxijenil.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/seed_coating_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/21981180228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/texapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/stone_poneys_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9579/3057/files/magisk_root_android_9_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/the_ultimate_guide_to_the_thoth_tarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9261/6388/files/wcpss_calendar_2020-21.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_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 5316 bytes
SHA-256: 21c866f48e05ce48dc7426a296be1139146a24349fd55361ed4e91ec7f64f6c8
font_01_sfnt_off000079fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 10272 bytes
SHA-256: a705cf9608510c98609e8dd5b8b8a041cd85317b6007620dbfb05897845fa12a

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