Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c25e6afe69b0ae1…

MALICIOUS

PDF

45.4 KB Created: 2020-10-17 16:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 36060ac432696c83405e2da304b9fb31 SHA-1: 369cef5a4723601b9c7c58d03440de1f517a9d06 SHA-256: 3c25e6afe69b0ae1ef37c668586914f7e83bdc8b231f60e51d49216278e8d6cd
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.com/123?keyword=lego+jurassic+park+75916+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f888dc8dfd03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f8aedb4ce623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f88bcdbcd53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f8813e018fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f89d8269d3b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f89eb645663e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f88be0185ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8736e17e448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f890359393cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f8746dc7875e.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/1/0429/8270/3257/files/bujulikawibonimijixumemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4948/7002/files/top_10_best_magical_girl_anime_and_transformations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8ae61f-c26a-4fe6-961c-03706d2bf2d3/7476530767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05de3eb6-9c59-455c-865c-39edd2733365/zenuxorobavuvijamorerupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d953fc52-2510-4364-948d-1e216f29d901/35272342196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c129ea34-a0f8-451c-9ec9-07810256d783/vunaweroteleralekagere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af9c188-5948-4de7-9693-5ce21561f70b/gafujurixuvilix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113f6a0b-2319-4ab2-98d3-4b75aa765e12/lonadilojoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4282e230-397b-49fe-9887-48c66d579744/16965359146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a5c0b5-8d1f-4102-a8a6-0ea8413059ff/motud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/jds_labs_element_vs_element_ii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7374/4277/files/exploratory_data_analysis_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5983/0680/files/jesus_is_still_the_answer_collingsworth_family_lyrics.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_off000066f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 5716 bytes
SHA-256: b35565c7b75203174a3453b7b270169487c16cfe5c78cd2961db9e72e5d94cb5
font_01_sfnt_off00007aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 14652 bytes
SHA-256: 509835f63360c5be53485d53bb8bceb625349d593fd62b7d45da121b943ad7d0