Malicious PDF — malware analysis report

Static analysis result for SHA-256 337a577d8092c0b8…

MALICIOUS

PDF

45.0 KB Created: 2020-08-24 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60bd48f7ad18b6c5fbd23b78bfcb4b7f SHA-1: f9a233cdf242ee02f71446779528b324f8856fa4 SHA-256: 337a577d8092c0b87e51b0a0fb078514388d5b02111ffe61fd1da3ba5deafc49
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=free+resignation+letter+template+microsoft+word'. This URL is presented as a lure for a free resignation letter template. The document also contains a large number of embedded links, many of which point to Shopify domains, but several others point to unknown domains that could be part of a link farm or further redirection. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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=free+resignation+letter+template+microsoft+word
    • http://tegixekum.mstellavato.com/uploads/1/3/0/7/130738755/nedulazubu.pdf
    • http://files.amsbandandchoir.com/uploads/1/3/1/8/131857540/6204815.pdf
    • http://verur.266michiganroad.com/uploads/1/3/1/4/131437987/dokunememimotire.pdf
    • http://files.northstarpgt.com/uploads/1/3/2/6/132681343/xurolivewebineg.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/building_construction_illustrated_2nd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/2358/6712/files/winter_craft_exploration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0373/files/free_celebration_background_image.pdf
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/lexarexurojojidutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/livro_o_cristianismo_puro_e_simples.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/john_deere_rx95.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/conformado_de_plasticos.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/zuzujebububerabifabadinik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/3585541758.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_off000072b0.bin
61c5fd2b9502446e6b126331b205d3cb3aad47c1a0f08bf3f42c04db102420e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 5520 bytes
font_01_sfnt_off00008571.bin
3da054f558d07f2afb27e58f564aaba245124b9bef9dd1e357e91ed9bd2717ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 9768 bytes

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