Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a25cd1fd51c45e5…

MALICIOUS

PDF

46.3 KB Created: 2020-10-25 08:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6e354be925c9a6147aefadabd9288d62 SHA-1: 9f86a949ec8d7fa26e598d4e0456efd9636f053e SHA-256: 7a25cd1fd51c45e551bf1484279352d7ab7ea7f2ba80c0446d23973e607817bb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=socioeconomic+status+and+academic+achievement+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f88371e5b4a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f94dda61226a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000753f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000753f.bin)
    • https://s3.amazonaws.com/dazemi/cisco_3750v2_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/l_express_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zinedatagufipetiwakinaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/exercicios_analise_combinatoria_e_probabilidade.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/20203947537.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/agency_problem_and_agency_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/24661823367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5854/2760/files/how_to_fly_standby_southwest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9109/1352/files/bellini_recipe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6173/4297/files/beaded_curtains_for_doorways_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8576/7850/files/wemepivesegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ad1bc-9968-4e5d-9b03-2f5da1c6a8b8/24936523532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6093904-47e5-48fe-b185-ad5ae8523291/giwekedopukojigavidaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c81e19c-bf07-4919-8b5a-95eb3a580eb3/nexanile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae55e3a1-2d58-42c3-9476-b1ef804fa55d/34553617360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b71788b-aef9-4274-939e-1f829aa7b89f/13216680870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2387ab-024a-4178-b039-2a8b4a0c218a/forced_womanhood_magazine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319f86ff-cf5d-4437-a6d0-14f5a27b5440/63018600529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f77f874-5cbe-4c59-b470-bdd261e749b2/78524764747.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 extracted file (font_00_sfnt_off0000753f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 5428 bytes
SHA-256: 6429cb998b7041f3434cf274d231a9cda275cbe65de4bbc292be8dee8855c392
font_01_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 10756 bytes
SHA-256: dec62a3e034b3f27a36a6829489269edc4193e77e9a602689f50892e3f530358