Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6752a4f653d7f42…

MALICIOUS

PDF

51.8 KB Created: 2020-08-11 21:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b7eea6b2521e35dea9aecf4e3a76c0 SHA-1: 14b272d2e158c049d102a8f7a081ebd8d925a202 SHA-256: c6752a4f653d7f42917185f5716698d4520213c176b6a5027098a341db966f19
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a resource for learning French. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious redirector.

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=learn+french+by+podcast+pdf
    • http://files.northwoodsrafting.com/uploads/1/3/1/3/131382078/6408436.pdf
    • http://fitolena.atlintranet.com/uploads/1/3/0/9/130969723/8598c268.pdf
    • http://files.stylisharms.com/uploads/1/3/1/6/131637125/2899436.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8642/files/17846975895.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/49478507914.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/49857858819.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/2093149028.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/70209651699.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/nikuxegepefumofodegabotog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/22994027226.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/41385801877.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/where_corn_don_t_grow_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/gadituwoxetajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/honda_rebel_450.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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_off00008c56.bin
d3d2c9022f65967def520b4ae6219a98a5d3f5fbff80c8e5b0ec99070a420511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 5396 bytes
font_01_sfnt_off00009ea3.bin
eba2dc603e3457613fa22c0dae9e57aeff68b5d158cbcb9e8503067e57dd32c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA3 10404 bytes

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