Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f3f1f81a761c89…

MALICIOUS

PDF

55.1 KB Created: 2020-10-29 07:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6ca0b8d68d5b07f707f1bb59106dbdf1 SHA-1: 18706889848962fe024454693c677f18b10b2591 SHA-256: 68f3f1f81a761c898eadf38abff5281ef0edbf93fe42b4acf7b2f3ad5a3cdaa4
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://cctraff.ru/aws?keyword=target+mission+statement+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f9356c34997e.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/pokudopun.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/dd754c73.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/pekamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8a15d8d2dc1.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/912726.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/rusaka_gawefimasigal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5f98cb045018b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f9154cbd187e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8721e235e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5f973238779f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f88ede1c7763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f8f5ae347911.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008929.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008929.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000c073.bin)
    • https://s3.amazonaws.com/zebarufuridorur/sound_design_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kasanokiminutori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5451/0492/files/bujavodisizimiboda.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/75868669127.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/venanosaduz.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/83823957900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/select_worksheet_vba_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/exercices_feminin_et_masculin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7425/1671/files/best_boredom_buster_games_android.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 extracted file (font_00_sfnt_off00008929.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8929 4944 bytes
SHA-256: e3b0f1262416b0d37d411f62a79995dbaf9d2b1c24fc9bff1fe7e8a3718f0c27
font_01_sfnt_off000099e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E1 11644 bytes
SHA-256: 76ff443f5c601f6933bb39494f442ddddc09e4879665ac6ac2a95d903f5dd089
font_02_sfnt_off0000c073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC073 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e