Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8950e833c25be73…

MALICIOUS

PDF

56.4 KB Created: 2020-09-01 03:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7adffd9db138afc274172b7da0b7e4ff SHA-1: c12c3780cb4b38bf95175205b7ba6f110a99658e SHA-256: c8950e833c25be7366c460da16c898cec91fc61ecc6bec943f8931e3512d7414
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the primary links points to a known malicious redirector. The document body, though heavily corrupted, contains fragments of text and URLs, suggesting an attempt to disguise the malicious nature of the links. The presence of a malicious redirector URL and the mass of external links strongly indicate a malicious intent, likely for SEO abuse or to lead users to harmful content.

Heuristics 3

  • 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.
  • 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.com/wix?keyword=synth+pad+vst
    • https://static.usrfiles.com/ugd/b8c837_c22188a4d1874ebfb824319da811562e.pdf
    • https://static.usrfiles.com/ugd/b8c837_24d129917d90431a908a9446f5890dce.pdf
    • https://static.usrfiles.com/ugd/39cb9d_0957926e7e404b49b5d08aec11c4c835.pdf
    • https://static.usrfiles.com/ugd/a838c0_0f8fb67358744676b832949cc42e3154.pdf
    • https://static.usrfiles.com/ugd/3d0627_62e39a37a60a46479388ca3cbe70cecd.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/advanced_language_practice_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/zufujokisizaliwusama.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/gewalowovisilude.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/sniper_elite_3_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/zepusoxigawoteferomapawew.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/caracteristicas_de_un_servidor_web.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/13050421801.pdf
    • https://cdn.shopify.com/s/files/1/0461/7981/1481/files/58515061811.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_off0000a029.bin
e3b8470243939548bfd807e95f9693a21ba4b145eb87bdb8e5fab54f75ac5e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA029 5184 bytes
font_01_sfnt_off0000b1d7.bin
e3682ee3e8dec7af92d6d4bf0fc46ace13c0863faf282fc203e070780cfed89f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D7 10392 bytes

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