Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9381ebd1325972…

MALICIOUS

PDF

49.3 KB Created: 2020-11-01 00:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 96b9560fa0150ebb24fed9ac24ac1f59 SHA-1: 8605d743d5c62ab428afd2607f0ba3e1ed835fc0 SHA-256: 8e9381ebd1325972aeb62bc46f536c1acbe5c6e5fc4b219ebf4a7b3bc355d647
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding numerous URLs that lead to various external resources. One of these URLs, 'https://cctraff.ru/wb?keyword=how%20to%20cite%20a%20pdf%20from%20a%20website%20bibtex', is identified as a known malicious redirector. The document's primary purpose appears to be directing users to potentially harmful websites, leveraging SEO-like tactics with many embedded links.

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://cctraff.ru/wb?keyword=how%20to%20cite%20a%20pdf%20from%20a%20website%20bibtex In PDF document text
    • https://fokakumunimu.weebly.com/uploads/1/3/4/2/134266115/nuxavanobibimu.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/9142995.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/f77e391.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/wovanul_dananilapebe.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/0c5621b.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/1418e0f5a05ef.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/rivoxawemifa_fafipaxatagadej_zutetirogu.pdfIn PDF document text
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/b210a62c.pdfIn PDF document text
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/2386309.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/b873f71f-d027-45ba-a6be-94fc523063c7/wutarudob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/4208/3259/files/pingbingding_wa-2608_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3124/7020/files/meditative_states_in_tibetan_buddhism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da66e72-3dec-4454-b538-ba339b76e427/69684901347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3814/7228/files/xbox_360_wireless_headset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/3139984824.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_off00007c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C30 5528 bytes
SHA-256: de935cd106c0cbee79b4a6d8d080bd3b85ca2ffcdf5982b91ae535f7ed7acbbd
font_01_sfnt_off00008efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 12048 bytes
SHA-256: 6aebb4b9d3112d007f2f8edff65e0c9a16c6dfc8c43e4a28ed0fa10323789f4f

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