Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19a21a9c8661596…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 05:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ae2764006d1b6e1ab6194d22395c958 SHA-1: 4d628df3814e13c0059bb07ecd44c42b1d73056b SHA-256: f19a21a9c86615968a12c6863838824c06d5df277c8a98d5f84f4b1cdd7e0cf5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body also contains a URL that appears to be part of a social engineering lure to install software or updates. The presence of many external links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=android+emulator+for+mac+10.+7.+5 In PDF document text
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdfIn PDF document text
    • http://wijejaz.designsbyoc.com/uploads/1/3/0/7/130739811/9ef4687a616b0c.pdfIn PDF document text
    • http://files.peacecamarillo.com/uploads/1/3/0/9/130969192/fezavopole.pdfIn PDF document text
    • http://sikuge.fairycot.com/uploads/1/3/2/7/132740805/kodasatuvelad.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/1/0432/9514/6139/files/narezijebobupik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/99452447313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/95894770786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/american_pie_sheet_music_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/housing_contract_purdue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/wuvufozetatixipamuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/gta_san_andreas_cheat_codes_free_download_for_laptop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/96827121142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/4137362491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/54493959992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/68650513997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/62506796006.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_off00006e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 5408 bytes
SHA-256: 00cfc29137e8d0dc8e14810af88652739d4ad0532d3ccfda16ff39f29fb47492
font_01_sfnt_off000080b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 10196 bytes
SHA-256: 5761fb160c51fe37d2e2004f1ee24d2721245a0f085bd18d865ee3c631af040c

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