Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e64debbefc81324…

MALICIOUS

PDF

44.1 KB Created: 2020-10-27 14:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 1ef870a1336560692e331a40b5d4836e SHA-1: 75a8e2abbfaff7f48ff5269961704a414f9b01c1 SHA-256: 5e64debbefc81324cea2f795e4df70acb1ca0eadbbd1efd93caee5e5a4f418c0
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.com/123?keyword=touching+the+void+chapter+3+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f88d7b3581a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f8c71f46d4cc.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/1/0439/5276/7131/files/82326043770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9456/7840/files/burrhus_frederic_skinner_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7781/1358/files/43684041028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/97110684721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c675d7ce-6546-4ad9-85d1-f0444959c51f/juki_ddl_555_4_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1791e41-9994-4938-8724-a337b816fbce/24997585545.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/automotive_repair_order_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/types_of_screw_threads_and_their_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5237/9553/files/hall_of_the_mountain_king.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9232/1451/files/feiyu_tech_gimbal_g5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2016/7586/files/wildwood_junot_diaz_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/espro_coffee_travel_press_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0699/2799/files/nouns_and_verbs_worksheet_1st_grade.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_off00006aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 5732 bytes
SHA-256: d9db52983a75d4596b4b0603a68ee498e9a253dff633bcc33b6d404e935b2a15
font_01_sfnt_off00007e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 10896 bytes
SHA-256: 9b0530dcea38df47b1b4609dfde7d842d7cce0c4c807f067b3ae995389c2329b

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