Malicious PDF — malware analysis report

Static analysis result for SHA-256 c919100c5561a68f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-22 20:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eb2fcc0df8df3464d3674b72a5e057a SHA-1: d0d7b57e8c4771e9c3d982f02a43f6a0f72d6513 SHA-256: c919100c5561a68f8b91f067879cfdf1da79a86f10bf6d2dd2a0c6c74c8cf628
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=power+of+speaking+in+tongues+pdf
    • http://ramawa.brand2bseen.com/uploads/1/3/1/4/131452976/gisax.pdf
    • http://files.bs.shenfieldlearning.com/uploads/1/3/1/3/131381374/dolibemifepur.pdf
    • http://files.caylarsamano.com/uploads/1/3/0/7/130775402/f918c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/65756692045.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/posulatobilujuzabelobop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/14547356404.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/articles_with_geographical_names_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/suvolalusuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/79687276964.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/berudolofusaramofileta.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/82517717629.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/feriwawox.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_off000074bf.bin
c3e8346aa65efce545dc5722712e5cc48f64bc3afafe1d23dc682ab3027fa284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BF 5332 bytes
font_01_sfnt_off00008703.bin
728e2f59f54ee19e9897ceabb67b6171f27ae8f2ab67c2a6e320f820da29e862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8703 10160 bytes

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