Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cff2e2a327e510…

MALICIOUS

PDF

59.9 KB Created: 2020-07-29 12:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8df07dd0fbfd255b318d98ff7d41e598 SHA-1: d43628214e6508697ad7bee081837ae186a4879b SHA-256: 98cff2e2a327e51032558fa1310a6ce925dabd9454b56d8e94a2ebe49f03af0e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used in phishing or malicious redirection schemes. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is designed to obscure the final malicious destination. Another heuristic flagged the PDF for containing a large 'link farm' hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious links broadly. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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.com/pify?keyword=ethnographic+data+analysis+methods+pdf
    • http://files.mosaicsyourway.com/uploads/1/3/0/7/130739783/wajubogivumonupu.pdf
    • http://files.tmharrisonphotography.com/uploads/1/3/0/7/130776103/lagesikiv.pdf
    • http://files.arbmic.org/uploads/1/3/1/3/131383775/narenugozon-jodek-jopajodosi-robobimemopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/xiraxozodume.pdf
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/77544662017.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/5868994861.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/65728984082.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/9881494567.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/62444122518.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/56038340038.pdf
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/sodiboza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/luxinita.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/82884305295.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_off0000acb2.bin
6eaf487bf424f42b68a1cf2d21bcabcb17fcc47a3ce6535f1ddd12d1474cfbf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB2 5416 bytes
font_01_sfnt_off0000bef0.bin
7a473f17647d7b287eacb5e8d6e79a2edbfa48f63a17e9ededdc500249ef9a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF0 10292 bytes

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