Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d4e2dd5ebcc69c…

MALICIOUS

PDF

69.5 KB Created: 2020-10-22 04:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2325e01d72b7e8004244b894fdd55785 SHA-1: 6f83d415e15f0a16744d66bbbd86b7b310c63a9b SHA-256: 83d4e2dd5ebcc69ca5f4cf3869a6e8f7c5f875f712062675913f7433571c3a44
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.club/pify?keyword=germany+climate+action+plan+2050+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f896a335faff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f90d672b2884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8754b3360db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8729b9d6831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f8ff8b6cca24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f9066c76b772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f909e87cadba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f90e04a22edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f90b451925c7.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/0c7de.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/d3a315e2a9534c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f888f4d081f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8a4d879b4b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_5f90b2679870d.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/1/0492/7756/7132/files/jabopavoginasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/ligavidobogulelulotig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/genetics_practice_problems_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3398/2618/files/zaffaroni_libros_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/section_2.1_matter_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/49575744569.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_off0000d26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26D 5656 bytes
SHA-256: 89d94f3a82ec6952fbe21ce444befeed5c4ccb62f298f81b4308ff572ff5818b
font_01_sfnt_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 10140 bytes
SHA-256: 7f83100a327d1de27223d1eb3960df7dcb3281a22f6dd1be02e68c2f23dbc484