Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3eae9d0e74d5d81…

MALICIOUS

PDF

32.1 KB Created: 2020-08-18 21:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03306edb259eac2a33748cb038353bce SHA-1: a7b8d367db387da47517d0caefed9a7347dc45ed SHA-256: a3eae9d0e74d5d81b9c5d80b5690f5eb8fc717a0254586c8229d87d0755f1164
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but the primary malicious link redirects to `https://ttraff.ru/pify?keyword=android+hybrid+tv+box+dvb-+t2`. This indicates a link farm or redirection scheme designed to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=android+hybrid+tv+box+dvb-+t2
    • http://files.pinebowerbc.org/uploads/1/3/0/7/130775588/8046707.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/sosaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/nunawerefurinora.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/62959839378.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/bilijobuzejodudigexas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/veloduzosutokerapukirore.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/92800639846.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/resojexivib.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/kovigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/adobe_reader_offline_download_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/ratodubov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/sanixiloporomilegidofaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/novovo.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_off00004512.bin
ec77fb5e1dc422a6b1fc2bb014c071df02ac54f9f03d6c094c04c0f2658bf544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4512 5016 bytes
font_01_sfnt_off00005630.bin
27456674c06253912bbd257249482a99e377edc3d24a9224df29f837ee1bacf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5630 8660 bytes

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