Malicious PDF — malware analysis report

Static analysis result for SHA-256 5423a6291675a4a0…

MALICIOUS

PDF

57.7 KB Created: 2020-09-11 17:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 49f76c288c47a68a10d39ded198abeb2 SHA-1: 6be5d7e5ba28b1f9bbb38fdffa1d67cd17551173 SHA-256: 5423a6291675a4a08c134e39b6ab43770c81a14371b49ba1588b9c1ed47d79e0
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.link/pify?keyword=allelic+and+nonallelic+interaction+pdf In PDF document text
    • http://wakixusu.redeagleranch.com/uploads/1/3/2/8/132815367/b25d0a23.pdfIn PDF document text
    • http://wixovexi.thecenterpittsburg.org/uploads/1/3/0/7/130776499/6030021.pdfIn PDF document text
    • http://titozed.smartfirstaidcprtraining.com/uploads/1/3/2/7/132712615/vufiwirilovofiz-pomisu-zumejivunenig-sojipot.pdfIn PDF document text
    • http://files.stbartschurchri.org/uploads/1/3/1/3/131382531/xowoxuvexiki.pdfIn PDF document text
    • http://files.centralhauling.com/uploads/1/3/0/8/130814858/kexojanenenuv-juselarulam.pdfIn PDF document text
    • http://tuxawuxe.thewrightograph.com/uploads/1/3/1/4/131406390/5656023.pdfIn PDF document text
    • http://duzato.morganfurze.com/uploads/1/3/0/8/130874493/judazus_timaku_xexekatedatoze.pdfIn PDF document text
    • http://files.yogaforkidsportland.com/uploads/1/3/0/7/130775310/8614018.pdfIn PDF document text
    • http://files.engineeringk12mass.org/uploads/1/3/0/7/130738620/8254156.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/1/0434/4853/3148/files/28798276717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/38047310607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/70718744348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/18595129229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1104/files/nonlinear_functional_analysis_a_first_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4248/6944/files/kezadef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/netemaworotenor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/70025482066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/77817061428.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_off000099e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 4960 bytes
SHA-256: d2a625730ac76f16c5c923808b07719fe350402bd05160bb23f73f32bd0d9e52
font_01_sfnt_off0000aad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD2 14792 bytes
SHA-256: f22ba24430c3188f556cbb4f19d191a7b4b105e73d84c150e9f69be81f73e975

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