Malicious PDF — malware analysis report

Static analysis result for SHA-256 520471b99cda5066…

MALICIOUS

PDF

34.7 KB Created: 2020-10-30 02:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 12975786603455e34b54eea12f873f04 SHA-1: c05687f5026f70e5ecbba5c928a9b5e7d602dd50 SHA-256: 520471b99cda5066955f27bee93ab99b7d4c9f464f1fb7f224b5f96c879762c2
94 Risk Score

Malware Insights

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

This PDF file contains an embedded URL that points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs and file names that are consistent with a phishing or malware distribution lure. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=microsoft+combat+flight+simulator+wwii+europe+series In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f89824e8481d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f9b5a020027c.pdfIn 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/97508920-7b73-4bf0-80c9-06cfb25347ef/59909709192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea16d283-c29b-4f93-a921-4c45683cc93a/gamigejosajuronumozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7145/8468/files/25591362884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da58f3d-a2d7-4603-a8e5-31344652d119/kotor_jedi_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1620/2651/files/8_agents_of_socialization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5732/2430/files/cooperative_society_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/harry_potter_and_the_deathly_hallows_part_1_full_movie.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_off000046d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D9 5668 bytes
SHA-256: 00a0b23b66ecb8fea1624616ab8267e313de12eaa1152699e315171b2fbc9931
font_01_sfnt_off00005a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 10496 bytes
SHA-256: 3d89be3c4ff266aa0fc288e1053bb74c3d304b421dd0ad29570c99eda297b967