Malicious PDF — malware analysis report

Static analysis result for SHA-256 cade17e1a89d25cf…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 06:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ff62f87984c2d2c02208d32a290a27c3 SHA-1: 72cbec8fda14decda5b923b5a14edc0ce415bd12 SHA-256: cade17e1a89d25cf0ccf97306b9b5b9b16cffa7a8908efbd9abf928a671e3b6f
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.com/pify?keyword=common+english+idioms+pdf In PDF document text
    • http://files.bcasbo.com/uploads/1/3/1/8/131857723/mijorilawigaj-sozaxunatel-nanoxif.pdfIn PDF document text
    • http://files.fourseasonsbeautysalon.com/uploads/1/3/0/7/130738917/a384a2feee9b8.pdfIn PDF document text
    • http://files.bjaycooper.com/uploads/1/3/1/0/131071167/bikizenapipimag.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/1/0432/0903/1840/files/wow_mining_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/87566565631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/98814267195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/18433754648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/laluruwavedovug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0433/6027/files/5394274307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/39391620587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/19442379970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/wepabuzizugodolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/fake_job_offer_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/47429894347.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_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 5052 bytes
SHA-256: 1b7bfe879dbaca8e4d0c73f28fa0b826fc19c7b3b01178b3b92eb5d18f0c4c83
font_01_sfnt_off0000786b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786B 10088 bytes
SHA-256: 1e573ea1edba08dba4044c4cce343edd54c5325ab515aa039378b675233f564e

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