Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc21e8886749d99d…

MALICIOUS

PDF

54.6 KB Created: 2020-11-02 04:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 24de6c35be11cb5d44a7d2d196f11325 SHA-1: f10f1454dae089adb66b85eb1ac299ff8bc96922 SHA-256: cc21e8886749d99dcf887f8da1fbff5f088444c26ce7083237af685a29bb61c2
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/aws?keyword=r+d+laing+knots+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8e63073cd2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f89f4c84c2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5f9f2bc159ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f9608b29c588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f8ec1b0078d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f92337eddc8d.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/1/0504/6419/4720/files/buy_turbo_mailer_license_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2333eca9-9e0f-4a1f-af03-a227f61fa54a/como_colocar_el_doble_espacio_en_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a1d4d9-3bb2-4e27-acf5-7aab21972951/tokyo_ghoul_season_1_episode_13_engl.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/votep.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_off0000976b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976B 5184 bytes
SHA-256: 02a35c6b61d43a5c9286213fc3e2ac29422a688a1ce331b71504f4e26f8367f6
font_01_sfnt_off0000a931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA931 10704 bytes
SHA-256: 797e9dc9e83524a92bfe2c7b4051be158fb82522f487ebdbadfbaa3270f51cf4