Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ee84e460e46153…

MALICIOUS

PDF

54.6 KB Created: 2020-10-08 20:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fbea3d9a1cc69f6a56d53d39f7c87b68 SHA-1: beff734eb4cbf55a490b558b37b24bd26b08d182 SHA-256: 88ee84e460e46153a486b8f15edb581ab91c8df7513a253a65c6313bb07b2809
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.ru/pify?keyword=empire+guide+warhammer+2. This indicates an attempt to lead users to potentially harmful content or further malicious downloads. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector pattern.

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.ru/pify?keyword=empire+guide+warhammer+2 In 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/1/0497/1148/0989/files/86843277855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/jirikezuxafexewipox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/idle_heroes_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/3459983841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7406/3010/files/copa_mundial_en_vivo_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5168/2454/files/7845376003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/malomukaretavutozoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0969/4107/files/german_christmas_pyramid_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/cemetery_plot_deed_transfer_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2399/9391/files/90619756709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dc981b-9d85-4f2d-a7b3-fa6f0c84075b/93621560857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8b2647-ae33-44b0-8e01-c2bb42e2ae4a/sawuselitedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70268267-1dfc-4424-8c02-8e858ec23b12/wamozadumeledotazop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8761bc-d62c-48df-b95a-a1479b3b78be/43302471675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/bevegosirojubogenugava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8113/7821/files/waxutubotusagorol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/words_starting_pe.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_off000097cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CD 5344 bytes
SHA-256: 25cc3e751e4235847fdeb747c28c84ca561d1525a6ddbdd9bbca57c13b77292f
font_01_sfnt_off0000a9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E7 10420 bytes
SHA-256: a8daedba1466b91bb19d62a738cc4386c6095762a5bcb1c0eee64009f1eed57b

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