Malicious PDF — malware analysis report

Static analysis result for SHA-256 9127b69b9e4b1c0f…

MALICIOUS

PDF

56.2 KB Created: 2020-10-15 17:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 23347ac8cc359b93b398f56a0f66e9b1 SHA-1: bd1b2e598ea76aebd39e4d14d57511c0a12565ca SHA-256: 9127b69b9e4b1c0f9bdb9189c503828cb901f13ddb98c41cf0717a4bb8ff00f2
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=pruebas+psicometricas+de+personalidad+pdf In PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/vurux.pdfIn PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/42371999714.pdfIn PDF document text
    • https://site-1039460.mozfiles.com/files/1039460/dexojowasafo.pdfIn PDF document text
    • https://site-1043887.mozfiles.com/files/1043887/78869168926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8814489ae7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8713fb8020b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f885fb551a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8734c013dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f883edd76a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8750b0426bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87566ce0850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f87db583b538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f8800593ca99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8805f8b9f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8813c51ac31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8726511f2a3.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/1/0437/4278/9786/files/sevinowejolotaxenofubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/91601797697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7978/2566/files/84996879615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7498/4863/files/to_follow_a_line_by_merlie_alunan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/vuwavixupopenisix.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_off00009afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 5444 bytes
SHA-256: 210853ede6ce7cf490d5d412f273c833ee5aa8e661c1008f62e33524d9848fad
font_01_sfnt_off0000ad54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD54 11120 bytes
SHA-256: 1e8fc9fc87ae2cca21894e985c1c45ec77eceb5afd3560973c481acaa1ce2e44

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