Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23027228f9d25e0…

MALICIOUS

PDF

57.8 KB Created: 2020-08-24 01:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dbb07c42ead3cb40e7e470d415271c SHA-1: b77b665a5379e8982c54f35d8a93d4429e97c6cd SHA-256: d23027228f9d25e063ab289ee8a89e5315447743cff32a0fa9a5b5a7d2b77dd3
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The embedded URL points to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same lure as the malicious URL, reinforcing the phishing attempt.

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=schengen+visa+application+form+south+africa+france
    • http://files.jdbscholarship.com/uploads/1/3/1/0/131069968/4547042.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/vipoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/azitromicina_solucao_bula.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/128075395.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/21832031721.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/gin_pole_truck.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/gta_san_andreas_cheats_download_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/19884104628.pdf
    • https://cdn.shopify.com/s/files/1/0435/2534/1343/files/ielts_reading_practice_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/php_else_if.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/jvc_kw-_v230bt.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_off0000a2a4.bin
c272f824a8909cf2aabd2040c632983ef1005bf69205217572ad617abf6f7c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A4 5592 bytes
font_01_sfnt_off0000b57f.bin
7593f55a8ba8cb4c399f1583d75995a71b106bceb189e3314270efef8ab6e7b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB57F 10672 bytes

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