Malicious PDF — malware analysis report

Static analysis result for SHA-256 62051e28ece2d47b…

MALICIOUS

PDF

43.0 KB Created: 2020-10-27 07:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 766ebd0b44f236600f92a8ad29dcbfa4 SHA-1: 2be447d817470d5e8db3888c320b30497ad11422 SHA-256: 62051e28ece2d47bd45fa1e83cb84543948483d5844ad09ce840bcd15edfa923
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The primary redirector URL is https://gettraff.ru/strik?keyword=paradox+in+literature+in+a+sentence, which is flagged as malicious. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious sites.

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/strik?keyword=paradox+in+literature+in+a+sentence In PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/62642e29af.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/852e82ec3.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/lakajexudabagu-defupasim-gefobexe-mimefevedima.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/vegilonusaxuv-jatebew-mitusajukage.pdfIn PDF document text
    • https://vabofofed.weebly.com/uploads/1/3/4/3/134337048/wevor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/asthma_medications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/fifty_shades_darker_book_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7078/3133/files/7629333738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/osmo_polyx_oil_application_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5726/1977/files/28136647175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3937/1676/files/graphing_quadratic_applications_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9712/8088/files/43310534564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/wazutonatonopoboreti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c80ef44-996a-4b87-bb4a-efeb867d461a/gikuroxibaxubetoxaxafazej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cf383c-dcf8-4361-86c5-39a6aaca4625/88794699272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5657dc2-2670-4913-82ef-cbc4b507b89d/liwuxafuwugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0086271-51ed-4e40-87fe-63bd80cbf24b/paxotunefuroguragoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31d9fae-2a31-4596-bbe6-f13c759fd693/52890723528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a7d525-efb1-4cbc-9dd5-59b05ac3b2ff/66040334408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e38ddc5-be68-4757-8b10-44516205b0de/zexovawelowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1802c5f8-e498-45f8-b917-3f45da474778/36965130911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1744e1b6-46ae-4dea-aa17-201f2b5ec64f/pajisuzuworeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ac4c37-e6a5-4441-978a-5f517c1380c4/xotazosejevesaram.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_off00006b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5000 bytes
SHA-256: 981f7a93fa08360999b7fd4fa9a80cfb62f4234c0a733a913c35b28f8bfd29b3
font_01_sfnt_off00007c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C60 10060 bytes
SHA-256: 6ca5a31bc353c005472fe637aca31a111943af5caa743476b10b5e802a4a38a1