Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c124c390a1cc312…

MALICIOUS

PDF

43.5 KB Created: 2020-09-03 22:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2688418c39d2448a899eecd8e6c934e0 SHA-1: fd964e296d9c0f7fcdefeb24afa66c12ddb8fc35 SHA-256: 7c124c390a1cc31261741c0fd366348b3eb8d2ae7c872756fb8946cd97a6e223
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a lure for 'Game for windows live 64 bit' and embeds a link that redirects to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the redirection to a known malicious URL. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO poisoning technique to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=game+for+windows+live++64+bit
    • https://cdn.shopify.com/s/files/1/0429/5596/4569/files/mojolof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/mapa_politico_centroamerica.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/96933465119.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/wii_wad_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/imperfect_vs_preterite_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/lemofufiputoselubeg.pdf
    • https://cdn.shopify.com/s/files/1/0460/0866/4231/files/free_ecommerce_email_marketing_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/44736298693.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/centriolos_estructura_y_funcion.pdf
    • https://static.usrfiles.com/ugd/b91566_9b626c74743e43adbc77dfb564ca449f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc0f95631f744759b2ac730f477f9fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d143e347cb6f40d6897c1cffc41a7f4a.pdf
    • https://static.usrfiles.com/ugd/76b6de_efd07316c2734ed9821940c0914119e5.pdf
    • https://static.usrfiles.com/ugd/fedf23_40c51f3c91ca43db8fe1238ffb322c45.pdf
    • https://static.usrfiles.com/ugd/576447_aef330285a314d3297a66d5cddd01509.pdf
    • https://static.usrfiles.com/ugd/a13bc2_c9d7325456be45e9a30dbbb044cc680f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ef9f9b8cea641d1ade1ba70ed8125e0.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b63.bin
54b69dc072f6f7bccb856200cf50fb9cedddf960a17440433dbc888d80ef070a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B63 5620 bytes
font_01_sfnt_off00007e89.bin
2ab67595cc3b4b0a259eac28e57356626a5e82c846d19b45751b104f611b35f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 10144 bytes

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