Malicious PDF — malware analysis report

Static analysis result for SHA-256 806d2eb954c57a39…

MALICIOUS

PDF

44.0 KB Created: 2020-10-18 11:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 33ffe10147ade1713b9af5feb0b88347 SHA-1: 74e922946db9579538d97c2d7e39aa1e7fde565a SHA-256: 806d2eb954c57a39143e2679277b3f6a15ad199b07f4f2bef6aba7fe17c2d45a
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/123?keyword=parts+of+air+conditioning+system+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8730e7993ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f87cd58513f5.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/186b2520351.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/6823386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f89ec26aa56d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5f8a8ebfe2fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5f8a4194b4750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f89fabc5d425.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/1/0484/0878/9150/files/over_capitalisation_and_under_capitalisation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/44522218460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/rekaxawezarilakokotosud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7358/3289/files/ragnarok_eternal_love_guide_merchant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/epic_summoners_2_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9222/3151/files/the_wonder_years_season_5_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7782/3385/files/79231344238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1497/7198/files/microsemi_syncserver_s650_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/posing_guide_childrens_portrait_photography.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_off00006e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 5548 bytes
SHA-256: f752204d7784719286272d0103a2d3a5bbe6d2ff0143fea79f81899f2ae71807
font_01_sfnt_off0000810e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810E 9932 bytes
SHA-256: 133050792308fd7c797a24bf282460b3c21118bbba1462880bd4521725670bb7