Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ca23f8a040ab69…

MALICIOUS

PDF

44.9 KB Created: 2020-10-28 17:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 04cd6f53beff8974d07d85ae7a4a68e1 SHA-1: 41c785c7b914abea339f9c1c7f461a8e5f00239c SHA-256: 18ca23f8a040ab69689242e8632f011ec4bbe02f8f83838a263b99d906961e27
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://cctraff.ru/aws?keyword=cherokee+indian+traditions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5f9913adb18f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f8c50f7eda98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f8a411e3706a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f8b4bce2e9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8938e14dae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f872f2104536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f90c8e845f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f88fc09be717.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000716e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000716e.bin)
    • https://cdn.shopify.com/s/files/1/0440/6027/8949/files/charlemagne_breakfast_club_height.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fb6040-d1f5-4b7d-aea6-6c1a9ecd99d7/nodobomopizisupizavabube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871977f5-744b-4698-b604-59e656275929/xunozuxodesikerakovipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/walking_dead_episode_guide_season_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ee6ac3-08e4-430b-9e0e-8b15d3f75095/russian_symbols_tattoos.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/lusevilerezutavunoxezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9779/8829/files/gononem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74cb6f5-e877-4bee-b3f7-823d12274001/marenijusomeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/biota_laut_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/divergent_insurgent_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/john_deere_44_snowblower_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0274/7839/files/pexibijin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/funcion_raiz_cuadrada_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8096/9111/files/godrej_window_ac_remote_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5093/3658/files/72988399811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9412/3720/files/pitch_in_music_refers_to.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 extracted file (font_00_sfnt_off0000716e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000716e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 4848 bytes
SHA-256: 5260bfb6d9bfca1b457c0d386b25048cc792ebd97854440bd775ac672eec590f
font_01_sfnt_off000081d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 10808 bytes
SHA-256: afcfb04095ad74127d71e54fdaeb6ce3a9cde1d100c0d3661db0be8f35217957