Malicious PDF — malware analysis report

Static analysis result for SHA-256 7845e7a7a7496282…

MALICIOUS

PDF

38.7 KB Created: 2020-11-03 03:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 53db26a5debfd7a9ef34892d5ff07f42 SHA-1: 0250bf8f4be2c863ec5403e995977c0cacefae7a SHA-256: 7845e7a7a749628282fe0f72328248a17ffd63bc88d42e9645748010fe40e795
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to SEO link farms. The primary malicious link, https://gettraff.ru/strik?keyword=download+sony+vegas+pro+13+serial+number, is a known redirector to malicious infrastructure, likely intended to deliver pirated software or malware. The document body itself contains text related to downloading software and serial numbers, reinforcing the lure.

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://gettraff.ru/strik?keyword=download+sony+vegas+pro+13+serial+number In PDF document text
    • https://luwiritogejoti.weebly.com/uploads/1/3/4/2/134266422/6911366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f9b187ad0bd1.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/3b110937-873f-402c-8954-c1f2a7b8736a/zodaromifudugumi.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/10350510879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53712da6-3970-4dc6-8d0d-e883f3dc3bf8/xbox_one_vs_ps4_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/enalapril_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/333899690.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/bhagavath_geetha_malayalam_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/legal_writing_transition_words.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_off000057ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EA 5888 bytes
SHA-256: 882714c9cb7114ce2daac50d423b0b084cde463007176d9762fd6363e558d879
font_01_sfnt_off00006c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C09 9928 bytes
SHA-256: 7505066aab19100f7e8bee8ad88c4a0c2802cebece2345bc321261d0c6d2e43c