Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafb9115c6c6ac84…

MALICIOUS

PDF

46.2 KB Created: 2020-11-02 21:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b6d361035f877a08a7f13f01e9c2add1 SHA-1: 7a8c0fe6e723b53cfd968b6ec76729bd2b5f2bf9 SHA-256: bafb9115c6c6ac845403c4b4981dd0d60f140745f3f0362bbbb6a363a6f4c3fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or lure users through deceptive content. The primary IOC is the malicious redirector URL.

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://ggtraff.ru/aws?keyword=natural+resources+in+europe In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/137f8d66-2094-40d0-a0b9-f7f1b8f0098f/farijulogigolezokipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0df071-f2c7-4687-b5eb-64a06fd7fef8/41101689916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8432/3741/files/compile_android_kernel_module.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d09d7c-9531-4f1e-b26f-dd6022304fc3/pijulajozekobubitab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b552c686-be66-472b-91ab-8e9a18adcead/62786672836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5298/8081/files/cuban_revolution_major_events_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52267e63-d006-40dc-ac44-3a23a1bd213a/fenutejozelusumevijar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd308f0-f5a3-4a07-bc67-2b6c9246753c/weapon_list_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0149588d-1ba2-4546-9be2-92e2166bf8b7/nowujisawibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7804/5862/files/20982442175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea9dfa5-b9a8-4916-bc8a-892d7fdd055a/21122499616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/83960632545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5296/4266/files/free_showbox_apk_older_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda691d7-14e9-4bce-aa5b-cd471d886027/88336165943.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_off000076f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 4896 bytes
SHA-256: 006c13f78e03c2d4e4ebb83aacb31bb081f9fab77202cf7a4bd751ebcb3a0e3b
font_01_sfnt_off000087ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AD 10704 bytes
SHA-256: cfb74981b4a6350ec22ac26c8aaf6ce25c93fa516ffc6f6ecec091d8dd1e7806

Open this report in the interactive analyzer, or submit your own file for analysis.