Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dd198805f04e7b…

MALICIOUS

PDF

55.8 KB Created: 2020-10-15 03:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: df1cae72216ec0e66897a0f6b6c4c074 SHA-1: e035638cf2e5d825501fae01b99d65be25e5e7e3 SHA-256: 90dd198805f04e7b4c1988a68ef2fcd00891bc8f97cb70fce3eecac755a23d87
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/pify?keyword=aids+biological+warfare+pdf In PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/beponuki.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/1d41fbd7b384b93.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87816c28ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f877ac67dad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86fea4663fd.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/dokufijaf.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/9663994.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/7460934.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/1647da07-a96a-4461-84b5-a96fa22f1c10/tutirokedorap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97489478-a099-4cee-a502-ce83313fd682/wuwabajawomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad73d902-2063-488f-a3fc-0b35ead32755/25043514698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf702e0-11f3-4817-8b32-ecfe4e058da6/28321069555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0990/3272/files/pijem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2139/7927/files/xenirilula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7506/2945/files/mapedovibavakilefuzajej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/manga_bird_apk.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_off00009ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD7 5544 bytes
SHA-256: 8fb18c89701b2fe712486553b344a14242ee5318b01c43f0a556a4e83cd37b7e
font_01_sfnt_off0000adc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 10480 bytes
SHA-256: 89edd3278372c0fbfeb0896f7b8347acef671d75143271af390e412df6cad8cd

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