Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d61b6d366f756b6…

MALICIOUS

PDF

56.4 KB Created: 2020-10-12 17:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 08e22465d533098ab9cbbec76f9cb06e SHA-1: 6f11d872e7a856b5ca1fca16926fb86369be3971 SHA-256: 2d61b6d366f756b694fc6a59c4bf4761716efa1f9f38bc96a32a22cb747023db
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=las+48+leyes+del+poder+pdf+resumen In PDF document text
    • http://files.tycammarketplace.com/uploads/1/3/1/4/131453807/fuzilozexumisuf_rekezulo_vixanedanan.pdfIn PDF document text
    • http://files.saucyvault.com/uploads/1/3/1/4/131452771/vimegakiberapag.pdfIn PDF document text
    • http://files.derring-do-medals.com/uploads/1/3/1/4/131453170/284962ce.pdfIn PDF document text
    • http://fevok.fairfaxpinesenglishlabradors.com/uploads/1/3/2/8/132816066/jibufatomabafa.pdfIn PDF document text
    • http://files.grantrestrict.com/uploads/1/3/1/8/131872298/e92a9738e2c2df7.pdfIn PDF document text
    • https://site-1043043.mozfiles.com/files/1043043/bizuz.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/19566269959.pdfIn PDF document text
    • https://site-1043608.mozfiles.com/files/1043608/82096579502.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/1/0435/8642/0893/files/90046663161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7634/6790/files/preterite_vs_imperfect_trigger_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/70633647497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/37390650045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/biwelaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/62838181808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4537/0528/files/59760000223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6074/3329/files/zemasufemotadomot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8454/8763/files/terrible_pick_up_lines_for_her.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7864/2581/files/bikini_bottom_genetics_worksheet_answer_key.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_off00009bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF9 5512 bytes
SHA-256: 8ab63f3a3608bd86c201010ea3b370b9583979e0ed4c6b6222ee6615bfc72ea7
font_01_sfnt_off0000aead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAD 11748 bytes
SHA-256: 963694663ea2b7542d868b2fb4c6104458fd5b66a8c632f2a42772f6ee02cb81

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