Malicious PDF — malware analysis report

Static analysis result for SHA-256 b221ed0268b619e9…

MALICIOUS

PDF

46.2 KB Created: 2020-10-12 12:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e28c0cca9e10c3c0e622cbcb6c01d5fe SHA-1: 800428af47e610029e5339c2670bb12e9942b3f4 SHA-256: b221ed0268b619e97799dcaf4a8c9db28a9bad00c149d1116685b5bf83c65825
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a keyword related to a game download. This indicates a phishing or malware distribution attempt. The PDF also hosts a large number of links, many pointing to benign Shopify URLs, suggesting a link farm used to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest an attempt to lead the user to a malicious site.

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://ttraff.club/pify?keyword=need+for+speed+underground+3+android+apk In PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/77083560009.pdfIn PDF document text
    • https://site-1041284.mozfiles.com/files/1041284/47460061.pdfIn PDF document text
    • https://site-1041188.mozfiles.com/files/1041188/99892763699.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/56473993461.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/66453130554.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/1/0480/0905/2319/files/isca_2020_acm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2484/3420/files/widuwefaboferetefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4091/5615/files/2020_slang_urban_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/secret_life_of_pets_rabbit_poop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f79dd11-aadb-42e5-927d-9aca5604f4ba/43524495160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec21be9-34cf-48f0-969b-3b289e311b7c/wejomabovupenipimerel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b8b37c-67fa-4eff-8c0d-00e1992e85d3/17559328112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc570b0-74f9-47a9-8189-a749ee25a07c/jajulonifutobora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/melepowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/bobbing_for_nipples_baby_shower_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/critical_hit_dnd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/turvey_for_related_rates_worksheet_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 5372 bytes
SHA-256: 0bd6364467c047e1b0765a43a9e6414ea8a356cd3d12cb7319987036faa72e09
font_01_sfnt_off000073c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 10068 bytes
SHA-256: 6f69c062dc0c352fb4e08af589e486c50475d4d8470201c1e9f890f0fc9b6158
font_02_sfnt_off00009659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9659 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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