Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d0926d8c0e3b7d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 09:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4595827e72c032c86575395ee5469a0e SHA-1: c38f0ff99975c3639c63121dd9a0efa1a40e2f2f SHA-256: 19d0926d8c0e3b7d40ac4271820a83e42464a8002f0feb08610437c7a908d056
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=bed+reviews+consumer+reports', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure under the guise of providing information.

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=bed+reviews+consumer+reports
    • http://files.keenecinemas6.com/uploads/1/3/1/3/131383456/dabetejajuw.pdf
    • http://files.jabaclub.org/uploads/1/3/0/8/130814749/0a5b845.pdf
    • http://niwamujur.capstoneifg.com/uploads/1/3/0/7/130776688/8ace91699b402.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/rational_emotive_behavior_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/carrots_and_sticks_don_t_work_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/black_s_law_dictionary_4th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/20719669315.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/61020927101.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/kids_pix_app.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/31792383494.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/75515191839.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/27760294577.pdf
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/6297943275.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/67789347951.pdf
    • https://cdn.shopify.com/s/files/1/0435/4650/9461/files/winchester_1897_shotgun.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_off0000648a.bin
7850ea8c1f97eecf7b5a840d1636e38db0313e4f756dc25667b2cf5525ebce2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 5180 bytes
font_01_sfnt_off00007624.bin
2a67ad6dc0e153871b426d31e2a54de5ef3438be73cb7bde9c1c994459c52970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 10644 bytes

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