Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ae352f79d53525…

MALICIOUS

PDF

37.7 KB Created: 2020-09-01 00:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787ef7f3eb74ad5229619ef30bff6090 SHA-1: eb857efaaf0c296f600cbd52e614ae93d88b5d7a SHA-256: d4ae352f79d53525c77255547d2c1bb0720fd6cfb9fc313e09761fd44d111664
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, many of which point to SEO-optimized PDF files hosted on Shopify. One of these links, however, redirects to a known malicious URL (ttraff.ru). This suggests a link farm used for SEO manipulation, with at least one malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, but the primary malicious activity appears to be the redirection to the malicious URL.

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/pify?keyword=dilbar+dilbar+song+dj++2018+mp4
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/coulomb_s_law_of_magnetism.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/born_in_the_usa_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/29557543360.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1065/files/lagu_tsunami_palu_donggala_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/38248751550.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/fourier_analysis_stein_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/kuvurenerozifezitob.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/wanoresuxedugopar.pdf
    • https://cdn.shopify.com/s/files/1/0444/3268/7271/files/lagu_bol4_25_matikiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/financial_reporting_analyst_pepsico.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/perosafoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/how_to_change_password_on_macbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/1540792192.pdf
    • https://cdn.shopify.com/s/files/1/0463/1825/6285/files/95427396747.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/zelutukiperevepaje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c3.bin
85e0458f0dc7d5aa97554f2ef2025a41c7312ce399058b0d28cac1c9c61ca142
pdf-font-stream PDF embedded font (sfnt) at offset 0x47C3 6100 bytes
font_01_sfnt_off00005c6a.bin
7ded221da435b8f1515dfc300985ba47b4ef4f2e769c0869fecf5b05d0ed60dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6A 2724 bytes
font_02_sfnt_off0000681a.bin
611fa18d2ecc8e0e17f884efce3ffde06c617e34bb740474d8d072a715fa0749
pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 9724 bytes