Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b201427de21e3…

MALICIOUS

PDF

41.3 KB Created: 2020-11-02 06:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 151991876175beba2fc8f9ae3329f1be SHA-1: 3fe5962488d360da46e498e936d8c48eaba95f65 SHA-256: 553b201427de21e3f319089f109beeca8a2b33d3dacb335be512d334016b3e5c
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.cc/123?keyword=unblocked+games+feed+us+6 In PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/ralugurumos.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/456467.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/zikugugimux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f888c2fc433e.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/6062709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8bcbd63b25f.pdfIn PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/3005894.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zogovakukinetuguper.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/1/0431/4936/1314/files/69013029909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3124/7020/files/chandigarh_city_planning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8306/3986/files/67661994869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d14d23-68c8-43ba-9127-8d013c08a791/78013740804.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_off0000602e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602E 5592 bytes
SHA-256: 6e60681b892cc4a33791b2d034f60f3f35562402249b4982ff2b8c4b71d60625
font_01_sfnt_off00007330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 11864 bytes
SHA-256: 748bc25e5a497ea887d72f86aa5e6ee3b420b9d1291b3aaa78af834e6557ab32

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