Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc1aeb5d8a59905…

MALICIOUS

PDF

51.9 KB Created: 2020-10-17 03:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2659a29d9ccf8b30c240a7fad4da2e43 SHA-1: 6c33201b088af43d6e1d22c213162bbdbb3b7cc5 SHA-256: bdc1aeb5d8a599057ddaf0dbc2605dfad1398c6926c982a9b662665268b9ccf9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which in turn leads to a large collection of other PDFs. This behavior is indicative of a link farm or a distribution mechanism for malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lure users to external, potentially harmful, resources.

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=java+9+modularity+pdf+github In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/9298899.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/pizabolurixuzawiwun.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/a1fa73cb.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/1/0434/7835/2022/files/orvis_pro_guide_waders_vs_simms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3675/2037/files/tipos_de_ferulas_de_yeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2499/0363/files/how_many_calories_do_wall_push_ups_burn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9297/6829/files/2500892624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0be8f1-5fdb-4daa-a4a6-9e94fdb329b0/86571154655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f326c4dc-3b98-49a5-8131-863b7a3ece5a/3591643920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8cddd2-5e91-4066-ae1e-3d2a8b86a8fc/84912051387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e06a57-12e2-4583-9455-37b0edd5f58f/90780104516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb56ed6-4ab1-497e-b1e8-3ac66b2cf9db/42152509774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/psychedelic_mushroom_field_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0852/2907/files/zobeleluputotovuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7488/2198/files/controls_for_nba_2k15_ps4_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8237/9164/files/stone_should_trees_have_standing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0310/0832/files/robinson_crusoe_daniel_defoe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1132/6119/files/can_you_use_keychain_in_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/7750339483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7121/2193/files/petrology_blatt_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8343/5674/files/little_tikes_cube_climber_with_slide_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/helicon_remote_pro_apk_cracked.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_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 5724 bytes
SHA-256: ce2e485cb2dc63dc2258811ab09ba3dc6cd0e25d3682e5d81f86be31d976401e
font_01_sfnt_off00009c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C95 10920 bytes
SHA-256: 20d55492450122a276bcb7e4eed062409332b478271489035557ba7c5c06ced7

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