Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0894653b16688b…

MALICIOUS

PDF

47.2 KB Created: 2020-10-26 19:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 898045aae5ecd78131f1aae3e9f04e26 SHA-1: e8607472633877552fbdddf52c32716cdd774c04 SHA-256: cf0894653b16688b6138898a19bd9b712b44ac681a37800929831f0550288b2e
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.me/123?keyword=kinetics+of+a+reaction+lab+answers In PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/tezaje.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/997cbf5025e.pdfIn PDF document text
    • https://gijepunudadolow.weebly.com/uploads/1/3/4/4/134497403/wexav-megonanoso.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/2558954.pdfIn PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/6275710.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/pisimogateku.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/wuzejorepadako-xawexujo.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/e0c10c2ecf74fe2.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/xezunebudawavumax.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/english_arabic_technical_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/entrepreneurship_theory_process_and_practice_10th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/ccna_module_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f9377c5b671f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f9586067a0e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007862.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007862.bin)
    • https://cdn.shopify.com/s/files/1/0499/9289/2576/files/compare_and_contrast_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1560/9761/files/which_of_the_following_statements_about_anabolic_steroids_is_false.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/improvement_curve_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/42878123477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d9a1bb-1c35-4a41-b218-f17303f06dfe/pavaduxividikowif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d63704c-2f85-45dd-8173-ecb16fb2633d/zoxejivodisurikekerojujo.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_off00007862.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7862 5076 bytes
SHA-256: 1c024a0dc5b801c3c02931e36aed475a31256d4bfb87e279008cea89ec3fe6ba
font_01_sfnt_off000089c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C9 11096 bytes
SHA-256: 3babaae732eca54d55f8d2313ba521759126d7aa53b5369a38050a2fbaf6aab4