Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e9fc602c5b540b…

MALICIOUS

PDF

37.6 KB Created: 2020-08-25 20:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 75a1d634c3cde63d17c0775154188cd4 SHA-1: 6ae81bd156226785d03edf6b339f0ad22ebdb585 SHA-256: d9e9fc602c5b540b886072c76e2741b29fde1afe52452b8490c656a5c49aceb9
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=nt+laboratorios+antibacterial+el+ojo In PDF document text
    • http://files.coloradoaps.com/uploads/1/3/0/9/130969089/cfa70280.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/1/0451/7848/6933/files/forojubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/edge_detection_in_image_processing_project_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/vonof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/mimululizet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/67964817136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/38525071532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/2877872646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/sapetekalej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/78738759044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/tedisijufaxibusamas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/feduxedobadizomagixiseta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/datutik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/5864796857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/84807094563.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_off00005498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5498 4976 bytes
SHA-256: 5cff152841fb04c505185c1145a83fde8f20279b1482357193defb3d656ab7ef
font_01_sfnt_off0000658e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 10528 bytes
SHA-256: 33374e81da945a8e48a3e050d855afc0588c5b744387f8673c225bb90ea5ccf6

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