Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fe84cd7272cfd7…

MALICIOUS

PDF

61.0 KB Created: 2020-10-17 18:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1152163cfa1c64a3af31ba2ca824f43d SHA-1: ec9a404fb8690ebd04d4354ed2d5a130015ac493 SHA-256: 50fe84cd7272cfd7aaa59ef2c44b5a02773746db65eb52293ba8f0188247c8c0
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://ggtraff.ru/123?keyword=ohio+lottery+ticket+barcode+scanner+app+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8758206a4c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8a92a4576b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f89b1edb4a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f895827496b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f872a3f9411c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f88d18b7de4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8b05923dc00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f89dd25b8272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f86f4da2ac8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f871604b1133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fad5a8e-ed70-44ae-b6a9-98a1b4608e42/pelefufexidax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f3e650-de82-48e1-ab19-3f1bcabe42f2/bazaxazotiviladukowumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434f1be2-1238-406f-8bb7-0b0eff4cf159/55324125348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca75b7c7-b970-4593-bc0a-eaa9bb73e875/gipog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd1c9bd-60dd-4b1b-902c-67553ff0332b/32845928133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0475/4601/files/52360076428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/root_galaxy_grand_prime_cricket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/wovojavatidopawolikute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4880/7831/files/specialized_hardrock_mountain_bike_26.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1508a55a-0268-4b15-a4c0-a417b02358ac/notafufoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432561b3-c40b-4464-bb74-5ed97604a7d8/3202849687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c95b46-3657-4944-b452-619a0406864d/jurojadifizujufefubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392ab5ce-608c-44dc-9ef4-79918d90b53a/jitezazag.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_off0000b032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB032 5492 bytes
SHA-256: 5d5f18a8fd2a8b8070f9513f78cfa8698682f405c976c08fbd07eb6e67eb3375
font_01_sfnt_off0000c2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CE 10392 bytes
SHA-256: 84cccff84f65baf131350592289ddc4664e505c5f55f73d02212f665841ec61c

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