Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd54dc8b34db39d…

MALICIOUS

PDF

92.6 KB Created: 2020-11-02 14:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b94aa4d64ac5e2ef79293bd2573187 SHA-1: 9f920c86e261bd99a9a084f20947ec8a4e144cb4 SHA-256: 0fd54dc8b34db39dd3a0a114efc625bd2f159e9216affd72d72b292befec84a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to external sites, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=brokeback+mountain+female+cast+members'. This suggests the document's primary purpose is to redirect users to malicious sites, potentially for phishing or malware distribution.

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=brokeback+mountain+female+cast+members
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f9c9da6c21d9.pdf
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/d4f71ba7f239.pdf
    • https://cdn-cms.f-static.net/uploads/4419626/normal_5f9ca6a5e41fd.pdf
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f93873363308.pdf
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f896c5b35dfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/abec464a-cbd2-4d7a-bfe1-0c0528efb945/25181783706.pdf
    • https://uploads.strikinglycdn.com/files/d3522867-b6b3-4abb-82d7-413b15a5c7db/super_campeones_capitulos_completos.pdf
    • https://cdn.shopify.com/s/files/1/0482/1342/6333/files/little_tikes_basketball.pdf
    • https://uploads.strikinglycdn.com/files/00ca9163-3aec-4c06-8759-b8cbb937415c/bass_pro_shops_xps_charger_manual.pdf
    • https://uploads.strikinglycdn.com/files/885d0f13-246b-46cb-a24d-842fbb80d3fc/scosche_rhythm_manual.pdf
    • https://uploads.strikinglycdn.com/files/4cc6fb13-e07a-473d-afae-906b05bdfa1c/73846915254.pdf
    • https://uploads.strikinglycdn.com/files/c6a634f7-8c79-4cda-95b2-0ae86f1a92b7/zofobijebederujux.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/god_of_war_game_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0501/6286/0197/files/dslr_photography_guide_book.pdf
    • https://uploads.strikinglycdn.com/files/1aca0e05-0000-4e41-a002-768edbbb6ff4/bufivadipeserogukofopewun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ea7.bin
8100ca0af37ea10a44f22c35155e19cad51f0b1b17856b0b061a8361ad55af70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 3460 bytes
font_01_sfnt_off00012afd.bin
d74989059f31b594345486a1fe7b9bf38a279eb656588cbae2534c967388456e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFD 5280 bytes
font_02_sfnt_off00013ce7.bin
c0bd16ff2c7429cc81374e0ca3687c8e77e9f7aa287dc2da794059946f2a51f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE7 12144 bytes

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