Malicious PDF — malware analysis report

Static analysis result for SHA-256 f776de15a41b1b57…

MALICIOUS

PDF

43.1 KB Created: 2020-08-04 04:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4acf36bbd848fe21aa63a7c613b5beaf SHA-1: b7b1361c0c2007eba9ed82592fd58bf6c9ef93cc SHA-256: f776de15a41b1b5715f3e2cf7e11117ded5429be63b681fa975dd4dc80c586e4
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=benin+history+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Benin history pdf' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious link farm. The presence of numerous links indicates an attempt to distribute malicious content or redirect users to phishing sites.

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=benin+history+pdf
    • http://files.bassetbuddiesrescue.org/uploads/1/3/1/6/131606968/6968088.pdf
    • http://files.levelnegotiations.com/uploads/1/3/1/6/131606502/83d4ed4eaad.pdf
    • http://files.artfulconnextions.com/uploads/1/3/0/8/130815381/c226f336ee0ba31.pdf
    • http://dazaz.chicagoundergroundpractice.com/uploads/1/3/0/8/130814085/lurorunobuzivev.pdf
    • http://files.gene-switch.eu/uploads/1/3/0/7/130776366/2301152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/59778124249.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/nec_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/30719232637.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/execv_vs_execvp.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/36456134587.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/87481889139.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/print_address_labels_from_excel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/taxufenukogedigokibelubu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/kejibirixuves.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/vimeo_download_video.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/gezusuw.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_off00006a98.bin
5049d6e2c7dd6dafb567920aa2b7c55360caff3897ea877f648dc8cc6e98f4a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 5036 bytes
font_01_sfnt_off00007bc0.bin
7b69b71def3cf2920e7a5b25872e8017aa9c5a90f843afadf4d6a08c338755d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC0 10804 bytes