Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb3db14edf6fe39…

MALICIOUS

PDF

41.3 KB Created: 2020-10-15 04:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6a8d75ebec62a75d5f2438a2aea0a34 SHA-1: 9eb79ad3f80221ded1ec80377f232c283c0fce33 SHA-256: 9fb3db14edf6fe395941513f44811abb7b360fa0ea432b2f5aa68bef9c031d29
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/pify?keyword=binary+ionic+compounds+worksheet+%25233+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f87696f5e737.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/susino.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/toridulubaxugof.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/teragikim.pdfIn PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/durerajamominakup.pdfIn PDF document text
    • https://site-1039737.mozfiles.com/files/1039737/38852468173.pdfIn PDF document text
    • https://site-1041499.mozfiles.com/files/1041499/32145455663.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/53554207980.pdfIn PDF document text
    • https://site-1039508.mozfiles.com/files/1039508/38837881116.pdfIn PDF document text
    • https://site-1043332.mozfiles.com/files/1043332/97928200372.pdfIn PDF document text
    • https://site-1040289.mozfiles.com/files/1040289/sabavebad.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/e4c93847-26a2-496c-aae9-6aebf659cfa2/lepiboripeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d5cced-8a33-45c7-9e0b-b6420f45c366/gupenatuveruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea945e9d-0c66-4e67-8c64-7aae7099bd54/42915434346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9333/7264/files/hitchhikers_guide_to_the_galaxy_online_read.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/meez_animation_guide.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_off000062a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 5588 bytes
SHA-256: c2e5e83ba3e011a42f14992c46ca102ed672604d17945eca6daf8471aae6f9b9
font_01_sfnt_off0000758e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 10280 bytes
SHA-256: 829bed1baaa537b30bcdc3516daddbb302eb97f7c0bfdea082827d56896778ca

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