Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb355d7a0f42032f…

MALICIOUS

PDF

44.2 KB Created: 2020-10-17 10:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 592ca29c13584be0d10522b6ad1f1424 SHA-1: 4910f46c308e3091928b0be5ef8ced69de53623e SHA-256: bb355d7a0f42032fceb36a4a8767ade3f547f594377f78f90c80d03d5ff9b9a8
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://gettraff.ru/123?keyword=request+for+proposal+filetype+pdf In PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/vajal_xitot_miviku.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/fijogadi.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/wovetuvutolafigoxen.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/6cd596d081d5ca.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/5064079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f88984a804c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8a7181b260d.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/341cf695-3123-412b-801f-bcbbbd76a176/15442728350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582b5e02-cd34-4ffd-af88-d2dfb52da927/89320723877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0181b5-61ad-4258-a805-af2bf19a6808/34372725383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53edaffe-0681-41e2-8cbb-9537836894ac/degejob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a94be5-9387-49c9-8ae0-338ce7469040/zisokirasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e50012-e691-4932-8e15-790498a90467/bikigubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3013/9039/files/jikato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5986/1912/files/40927801610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/how_to_get_iga_jonin_smithing_text_nioh_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8045/9456/files/danielle_cohn_age_google.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/17280239815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3632/2203/files/1592039936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8281/8751/files/benchtop_pro_scroll_saw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/78336331333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/setawibufida.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_off00006ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 5268 bytes
SHA-256: 9479815f7c0b9da751e81ebb2d7c06c26f36cd33eac907d749f4854777190528
font_01_sfnt_off000080cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 10228 bytes
SHA-256: 5936d6a94a9ce18b1e6e6081a46ea5dc2c1a7720592f17845e36538da85b53d4

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