Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef629134079b445…

MALICIOUS

PDF

44.7 KB Created: 2020-10-17 10:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f213f46368aa9517952861ba4d66acdb SHA-1: 78f2de863bb260665b8f3144e539f5fc1e90f9f4 SHA-256: aef629134079b4454fbd8c57ffc66c93e732af35427c074ee359b12814b3ff27
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious websites. While no scripts were explicitly extracted, the presence of numerous links and the ML classification indicate a high likelihood of malicious intent, possibly involving a link farm or SEO poisoning technique to distribute malware or phishing content.

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=salsa+de+pi%25C3%25B1a+con+habanero In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f882dc2c43b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f89037039070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f884c3de66c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f86f61b935ce.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/1/0496/2825/0276/files/puzusavizuzidozijironapit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/wealth_x_report_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9177/8454/files/getefaset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/unblocked_games_ussr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3632/2203/files/74348484397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f9bcef-6262-49be-9bfb-f78e4f620227/jetawedibajawiromomavadup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e87f48b-4779-48be-9744-2c6e4729ee3b/pidapofasibozozotepanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1d4a23-48d1-4d9c-9a81-701b98765183/olafs_frozen_adventure_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2a81b5-80d7-4c10-b91c-506b62d8ca50/jamekin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54562456-d1c2-4ecf-acaf-864a3bcf85d6/sajujerobasoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/tivewuleretor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/2_comma_club_live_login.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_off00006bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB0 5616 bytes
SHA-256: 7a565e26e61c5469eb2595e2846242d2d826573bbe4700cef3a813f93815dd49
font_01_sfnt_off00007e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E63 11428 bytes
SHA-256: 422b778dce6212fc1f463038765b1eb0d339021ad5b4ec215cff4fa30f0b94e6

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