Malicious PDF — malware analysis report

Static analysis result for SHA-256 d472ca4e5c70a97e…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 06:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d978a4f564637c345cf345eb8b83f3 SHA-1: db3c02dab49e14c4210c021b052f0229667e5e05 SHA-256: d472ca4e5c70a97ea0126800164f2e8faccaf37fe107cd765762da2dfe0a1d8f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a search result for a violin book. The PDF also exhibits characteristics of a link farm, containing numerous external links, many of which point to Shopify domains. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.ru/wix?keyword=essential+elements+violin+book+1+jingle+bells
    • https://static.usrfiles.com/ugd/b8c837_56559554df5042258aa198d5b6fcb246.pdf
    • https://static.usrfiles.com/ugd/8a419d_cd591039f1914c5d907715eff0278185.pdf
    • https://static.usrfiles.com/ugd/b8c837_a427965a6c934825839395d22f6d7510.pdf
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/bin_sachivalay_exam_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/fawinejadobuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/89650796502.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/plus_one_business_studies_textbook_malayalam_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/32190448262.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/jevizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/libro_administracion_de_recursos_humanos_chiavenato.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8998/files/kubituwudamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/20385842882.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/wezozoxon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/mubovegage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.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_off00004693.bin
cbfa8443802c6cafff2201ce7337157795ad45d5d7c6951555f9c72b00c2cac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4693 5260 bytes
font_01_sfnt_off0000587e.bin
7d1ceec103e35b48f3c8e05f3786e159a14d3eac01a8a56e57a049f8faab2c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x587E 10084 bytes

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