Malicious PDF — malware analysis report

Static analysis result for SHA-256 a476c7d5da089039…

MALICIOUS

PDF

38.8 KB Created: 2020-08-25 00:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51d8b26ebed9d654e15a5621ce13a539 SHA-1: 18073b1640ce75a1300299f4836a0f9e91d29909 SHA-256: a476c7d5da089039d010dd463ba667328f874c101314a7f623f40bb576c73be9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=hide+navigation+bar+android+note+9', points to a known malicious redirector. The document body, though partially obfuscated, also contains this URL and other links hosted on cdn.shopify.com, suggesting a lure to external malicious content.

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=hide+navigation+bar+android+note+9
    • http://gopujig.traughberlaw.com/uploads/1/3/1/4/131438392/savadolerud.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/wasax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/41715317682.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/gmat_integrated_reasoning_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/3694579201.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/bidozazit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/fobisagosojo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/79676120970.pdf
    • https://cdn.shopify.com/s/files/1/0438/3096/8480/files/46454735361.pdf
    • https://forums.androidcentral.com/showthread.php?t=940143&s=4c1ceebcbca918b9d5a0dec15734f766
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.androidcentral.com/showthread.php?t=940143&s=4c1ceebcbca918b9d5a0dec15734f766
    • 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_off00005b4a.bin
8f174e4cfc15462f04338b3e69d8ab105d66a24311656f533a01f2c81e862477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4A 5100 bytes
font_01_sfnt_off00006caa.bin
96ec445b61d7abf66b0aeb436cdeddc81076df27ff917a914ce05ff1cd509fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 10024 bytes

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