Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3df41cb82c36de7…

MALICIOUS

PDF

47.5 KB Created: 2020-10-06 09:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2949a86d722ce3e510a414fce692c925 SHA-1: 598263e2c76c516d9cf4c113963d707027a177aa SHA-256: a3df41cb82c36de7501e19f9e068df9e156b73033cacf7a02d03ef1978511682
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The presence of a link farm heuristic further suggests a malicious intent, likely for SEO manipulation or to distribute further malware. While no scripts were explicitly extracted, the nature of the links and the ML classification indicate a high likelihood of malicious activity.

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/strik?keyword=terraform+ecs+blue+green+deployment In PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/23893897292.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/35665921700.pdfIn PDF document text
    • https://site-1039632.mozfiles.com/files/1039632/gapebun.pdfIn PDF document text
    • https://site-1039301.mozfiles.com/files/1039301/18529038197.pdfIn PDF document text
    • http://vazom.creativeteachers.ca/uploads/1/3/1/4/131408984/8886371.pdfIn PDF document text
    • http://pubuxi.spectrumoilfieldsupplies.com/uploads/1/3/2/6/132681218/rogevefinip-ziwokudi.pdfIn PDF document text
    • https://site-1038504.mozfiles.com/files/1038504/womofisujuw.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/latosevogaxotem.pdfIn PDF document text
    • https://site-1038756.mozfiles.com/files/1038756/bowewonapazavipuku.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/9563459551.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/1/0496/1910/7993/files/what_is_an_angiosperm_brainly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8897/4502/files/81949185898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/monster_hunter_stories_qr_codes_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9291/2549/files/scotch_thermal_laminator_vs_pro.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_off00006e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 5668 bytes
SHA-256: 38525d78e520f8bc5c02b6f55710aa8deee804dc82adb2f4fb22b68f65fc5ae4
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 15140 bytes
SHA-256: 31b75702a1bcaa5dccaf4f15676eab9a52f614feb1263d774cfd255eeb1d9eea

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