Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52254dc1fa00c00…

MALICIOUS

PDF

34.5 KB Created: 2020-08-11 13:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae636b616a75623ae78a402fbd3c735 SHA-1: 2711f32846ea00de08a062dd1d8e63fff679b4f0 SHA-256: e52254dc1fa00c009e188c7c1c228fb82f5d52fef347bc781ca902dd7cb1e9ad
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=cost+and+management+accounting+questions+and+answers+pdf+in+tamil', leads to known malicious infrastructure. The document also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=cost+and+management+accounting+questions+and+answers+pdf+in+tamil
    • http://zedurit.arideisland.com/uploads/1/3/1/6/131637257/6756444.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://gekalog.resourceology360.com/uploads/1/3/1/6/131606755/verawoseru_puzezetuwup.pdf
    • http://files.senterpieceflowers.com/uploads/1/3/1/8/131856158/6245807.pdf
    • http://gopupip.elhorn.com/uploads/1/3/1/6/131607163/bafaff1a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/lawuwegamamalepawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4034/9082/files/latesilopobejopup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/alergia_por_picadura_de_pulga_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/gefitebuxibevidowisupiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/certificate_of_incumbency_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/50959246878.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/76075220046.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/active_listening_1_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/nalipisare.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/62259480.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_off00004a41.bin
a30521c73db4384f25cee223075bf2c54be7b7fd67937de4b9e19876f7ffe226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A41 5596 bytes
font_01_sfnt_off00005d3a.bin
d5c84adb93768061462ad2d57aebe1df54890a204ad494dbb47236d8c15c9914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 9184 bytes

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