Malicious PDF — malware analysis report

Static analysis result for SHA-256 011a178d19e888cf…

MALICIOUS

PDF

48.6 KB Created: 2020-10-26 22:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8112e5d9ba9ad412a73dab5cb9a9b2b4 SHA-1: ba53b30e41725b3832308a0a12f36f75cf42002f SHA-256: 011a178d19e888cfe5e6a91d888e7cb868a98a24928ab70c9c848c6cc5583c9f
154 Risk Score

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://ttraff.ru/123?keyword=the+baldwin+school+wedding In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f8e592fd7759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f89160523801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f92cc56dea24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f8fbf3039487.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/mobeniguf.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/jomumoguwujo.pdfIn PDF document text
    • https://lamuvoraraxuz.weebly.com/uploads/1/3/4/4/134486612/bareta.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/sizaku.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/1/0433/1647/8110/files/facebook_ads_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8914/1664/files/wavufatezunosixinagukevef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/lawonaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7281/8845/files/best_voice_training_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/vbu_b_tech_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48eb545c-0c40-454a-851d-a7574033503f/star_wars_12_inch_figure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa80f13-f062-4b07-951b-573bb8f42cb1/7677203387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f545e030-9072-4d7a-9c44-63d475c9e79f/gran_turismo_4_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5386/1032/files/aspersor_manual_de_acero_inoxidable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/nuwagab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/95298950789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3235/4205/files/62235804533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6714/1017/files/mudopiwobobinariler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/84365040080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/age_of_consent_for_mental_health_treatment_in_ct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8861/8677/files/divi_testimonial_slider_module.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7299/5996/files/on_mystic_lake_kristin_hannah.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_off000069f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F4 5284 bytes
SHA-256: e5de957c51dd215564770d780c6d9d4a47d5edf7224ba873c65df48cc0bf2e53
font_01_sfnt_off00007bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF2 10368 bytes
SHA-256: 46b33f95c37a1b2ec5336e9d532123a37fd3d9ebc42a749b6517cb4ae41911c0
font_02_sfnt_off00009f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F64 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8