Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1cf44674efe325…

MALICIOUS

PDF

59.0 KB Created: 2020-08-30 14:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b549cf0776866a28d6ab845ba6cc923 SHA-1: c18743f189ec830f261a6bfa07a7a97ce5b9952c SHA-256: 2a1cf44674efe325ea29da6950ac97c6db21c2d80b26d6f9fa694eefccbaf1ca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=strider+hiryuu+1'. The document body, though heavily obfuscated, contains references to this URL and other benign-looking URLs hosted on Shopify, suggesting a lure or distraction. The PDF structure and link farm behavior are indicative of a phishing or redirection campaign.

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=strider+hiryuu+1
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/tomipegelegozeludotem.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/4477565595.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/contractor_authorization_form.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0ddc70e042de4294bf8f3a891f502154.pdf
    • https://static.usrfiles.com/ugd/bfbc46_fd6df23321ce486b9e9615adcf1e2d6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc438509ef674caf95ed813883331695.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83cb3f7aa5748c1ab91b8ec145a8655.pdf
    • https://static.usrfiles.com/ugd/ef7b09_cafc872a7ea142de99e1c4d87c6264ee.pdf
    • https://static.usrfiles.com/ugd/09273f_c11250343bf748b98aa5db4c1c42a0ba.pdf
    • https://static.usrfiles.com/ugd/dd4472_c3c5d8bbc70e4a339f09b05254c38ac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_67eb5d5703fc4132aa067bcf59a9372d.pdf
    • https://cdn.shopify.com/s/files/1/0464/5493/1624/files/nimibugodukinazugibubuvir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/narasimha_karumanchi_data_structures_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/wilitap.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/53161646864.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/13934361869.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_off000088cb.bin
daa736633c32f0c1fc180006aa7c14312becf86322bb5daeaac7479068825e81
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CB 10232 bytes
font_01_sfnt_off0000aadd.bin
3c189a9768cf4c83832caac79b3f3712aed9318460867b609ce934280985c76a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAADD 4748 bytes
font_02_sfnt_off0000bb04.bin
de25a774c3fb55916195736a9f93ab46d8fa1d72e51267d700c94cf6ffa7ed02
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB04 10444 bytes