Malicious PDF — malware analysis report

Static analysis result for SHA-256 604a4e44dd2ab724…

MALICIOUS

PDF

55.1 KB Created: 2020-10-14 20:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39390bb47c8655d3a8f2a48324327e8b SHA-1: 5b86ca8b9f1e036d0bf065ca0ce6c41c1dfcef5b SHA-256: 604a4e44dd2ab724911bee3e377a5b25b9f8332688d8843b5aa7b56cd631bc55
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://ggtraff.ru/pify?keyword=ielts+preparation+pdf+2020 In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/jelegojisulone.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/d069c180a.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://site-1043375.mozfiles.com/files/1043375/63216762804.pdfIn PDF document text
    • https://site-1038519.mozfiles.com/files/1038519/lunoviwogifiruxani.pdfIn PDF document text
    • https://site-1039563.mozfiles.com/files/1039563/pegis.pdfIn PDF document text
    • https://site-1039999.mozfiles.com/files/1039999/lutozipevagozujo.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/49013373381.pdfIn PDF document text
    • https://site-1039789.mozfiles.com/files/1039789/zajut.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/sominumusemizetasef.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/17967850807.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/41215198237.pdfIn PDF document text
    • https://site-1044117.mozfiles.com/files/1044117/junerumeriwumedok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/protein_synthesis_steps_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/roblox_executor_download_mega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/do_ohio_lawsuits_have_to_be_verified.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4517/3413/files/17007358935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/81782688108.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_off00009946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9946 5244 bytes
SHA-256: 3b0e4c11e32dd9f2a4c4d5e98be5fc16641841f0b5ac0a79dcc24237975551e9
font_01_sfnt_off0000ab21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB21 10652 bytes
SHA-256: b82c738b2eab19a3202aee65bcffcee1d4f6818baf1a97a57fb09e15f526759e

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