Malicious PDF — malware analysis report

Static analysis result for SHA-256 02deff4a017e2cc9…

MALICIOUS

PDF

42.3 KB Created: 2020-10-26 09:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 383be989b119f989e6d216afced74ac2 SHA-1: 973a6d58a91e5ab3760d97a2bb45785546f846d5 SHA-256: 02deff4a017e2cc9640f42aba213f959fbdfc18706bfe96d0caac0b857fc70e7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics, suggesting an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=everstart+maxx+k05 In PDF document text
    • https://xutetuzaxudekit.weebly.com/uploads/1/3/4/3/134371691/vufozifumolovo.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/wufiteduzilolagasavu.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/musux.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/junukavobojubimazuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_5f93fc84b8d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f95730e63ec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f8d31bc7153f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f89df63d7272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f88cab75b264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8a8e5631aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f89260ac058d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f89492927ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f89ff137fe98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f95570ca920b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5030/1590/files/53702048748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/22295956798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7168/5027/files/73021530973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8092/8420/files/kill_the_cannibal_witcher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/kejoxel.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/55120113484.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/impacts_of_arusha_declaration.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/www._online_converter_to_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C6 4740 bytes
SHA-256: 42d9dc4c7909ab4ca2a75fe61fff9318a97e34a15487dbb5e8e758a1253c9a75
font_01_sfnt_off000069de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 10528 bytes
SHA-256: 7ce159e9149627d2eff843f008f58f3e584ad64c56696bee72b6c3357ab1ae9b
font_02_sfnt_off00008ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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