Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada18a244c76dfb8…

MALICIOUS

PDF

56.7 KB Created: 2020-10-05 18:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 842b7376d262fa45e66306fe24173b49 SHA-1: f17038749976f09bf5849194f6563990f468ab05 SHA-256: ada18a244c76dfb8936f0f322051b011fe637946b7f8186e7bae7073ed8dc896
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://gettraff.ru/strik?keyword=anime+figure+drawing+tutorial+pdf In PDF document text
    • http://fatafufub.autumnmoonhaiku.com/uploads/1/3/1/6/131636744/kegumaxenurusixove.pdfIn PDF document text
    • http://mofekimam.thelionspack.com/uploads/1/3/1/3/131380733/8b591.pdfIn PDF document text
    • http://files.ardhamoonyoga.com/uploads/1/3/0/7/130739994/4786040.pdfIn PDF document text
    • http://vomug.jamespbarker.com/uploads/1/3/1/6/131607310/3464213.pdfIn PDF document text
    • http://files.ofuel.us/uploads/1/3/1/3/131382786/4881955.pdfIn PDF document text
    • http://kanupofu.eatforyourlifetoday.com/uploads/1/3/0/9/130969627/madeferegogapu.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/1/0435/3739/9957/files/pls_5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2582/9527/files/la_historia_de_la_geometria_analitica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4940/1499/files/53602667028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0822/9015/files/78747513280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0918/2365/files/dewuwerajukagenigexuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafaad96-4a66-48d5-b940-08c771eb7f1a/55998559827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89dc94d-23f8-4692-8ec1-27f989dce91a/26831242142.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_off0000a03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA03C 5264 bytes
SHA-256: 805e5d150cbb26613fd3898b050a3e6da236d46ae8d078ae8a6af1e4e83b7023
font_01_sfnt_off0000b227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB227 10348 bytes
SHA-256: bf1e3b5d807d5a26bdb77b0a2363caf65011490cf33d8ddb6da434226904922e