Malicious PDF — malware analysis report

Static analysis result for SHA-256 d563aee9d6e1988b…

MALICIOUS

PDF

59.7 KB Created: 2020-10-02 22:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac57d152411286330edffa9deb4f6701 SHA-1: 1a36176d8770031566456b6f68c78eb14da4b122 SHA-256: d563aee9d6e1988b4ac326b088163f5c128e1e179a993baf0acefa4e63046301
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDF files, likely for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at `https://gettraff.ru/strik?keyword=algebraic+projective+geometry+pdf`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious content. No scripts were extracted, but the presence of malicious links is sufficient evidence.

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=algebraic+projective+geometry+pdf In PDF document text
    • http://sokixow.sherrychaples.com/uploads/1/3/0/8/130814576/2c30dc.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/23305490550.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/setesomodefud.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/senibokav.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/27893514144.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/1/0481/5916/2519/files/micon_cinemas_eau_claire_movie_listings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1943/0820/files/fortnite_battle_pass_skins_chapter_2_season_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/paladin_classic_wow_quests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/54626776535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8559/7346/files/13601140105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38406e49-e7de-44ba-908d-723e3ac14701/25836917476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb21834-476d-4378-9e9a-60b8f57b3ad7/30057760579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70579094-aab7-400b-827f-8541c854cd36/boxopiwufuxided.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d9568d-ec14-4e1e-9e7f-afe6ef2a9e80/25939393147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6022ec-2935-4f86-b13e-683f314b4057/xanusakaxofizufa.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_off0000a2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FF 5664 bytes
SHA-256: 302b1b081ecf5c6710224870020b6d85793445cd27c76d592704d6d51df82b70
font_01_sfnt_off0000b646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB646 13464 bytes
SHA-256: dc7fa9debf8b82305034588e127bce46cad76d8a485e5cd6518b785a150483a3

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