Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b161d652d8e6cf…

MALICIOUS

PDF

135.1 KB Created: 2020-10-29 05:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 70382c012d8c73a577cfd6ce8d68955c SHA-1: 8c709429d5ad569749e25fbfee652cb2d2c31e58 SHA-256: d8b161d652d8e6cf152d76b7df5df5a25413333cf195efce86c98066c025c3ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to a suspicious URL. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many of which are likely malicious or part of a link farm. The ML classifier also flagged the PDF with high confidence. The embedded URL 'https://gettraff.ru/123?keyword=kap+140+autopilot+for+sale' is the primary indicator of malicious intent, likely serving as a redirector to a malicious payload or phishing page.

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=kap+140+autopilot+for+sale In PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/8683432.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/zakikuleka-nukavapegep-nuwaguna-doxawovare.pdfIn PDF document text
    • https://bopifodefow.weebly.com/uploads/1/3/4/3/134383970/3bb9ae3db4.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/vededogetikis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/nininobemozunaguki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/how_to_set_a_tomcat_wooden_mouse_trap.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/lejomaxotis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/von_thunen_model_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/buddy_system_at_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/john_rudy_park_soccer_fields.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/wivodavidipitituxawutaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9638/1871/files/sovereign_debt_crisis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2654/5305/files/iridium_9555_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/bestiary_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/appium_desired_capabilities_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/android_studio_gradle_install_task.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/dell_inspiron_15_3878_i5_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/basic_english_reading_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7205/2132/files/tovowiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/shs_reading_and_writing_curriculum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/technical_writing_and_communication_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/54928163187.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_off0001d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D328 5144 bytes
SHA-256: 9a26141edb6e8b402be1ed08ea458422ecdf61fea84c431a0bb7021110974789
font_01_sfnt_off0001e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4CC 12448 bytes
SHA-256: 7a9311b1bbd2285244cf7e1d2e5eb5ceef5dde6a2ead692948adc998a781de16

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