Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a90c6cfab3a18b…

MALICIOUS

PDF

37.0 KB Created: 2020-08-15 15:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 039fdee2f0a0d7a6812927454a5b4de4 SHA-1: 9ba66a09a887ee084553e85bf54a740ceee9a827 SHA-256: d8a90c6cfab3a18bcc62bc6bda89e1351a2daf1e596a03b9637bbf3b3cfb16f4
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a "complete parachute band pdf" lure. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms the intent to lead the user to a harmful site.

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.cc/wb?keyword=complete%20parachute%20band%20pdf
    • http://files.stella-luna-charms.com/uploads/1/3/0/9/130969623/bilinurejupeba.pdf
    • http://nulexaxub.dragonflyphotographyceramics.com/uploads/1/3/1/6/131637814/5646035.pdf
    • http://files.floridalgbtqmuseum.org/uploads/1/3/1/3/131379820/vuzajizax.pdf
    • http://files.churchontheshore.com/uploads/1/3/1/4/131407565/baxomote.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/jelelolenimujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/kugevu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/96109669181.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/revor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/compress_file_size_online_reduce.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/guzatulawivuxel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/69576826023.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/tizugawagukekopefup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/fupejot.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/53062985659.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_off00004ae2.bin
5fd23d522e2b9220838aaeccd67ebc43c137a8ab8ec712a5aaafd00116d7655c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE2 5260 bytes
font_01_sfnt_off00005c90.bin
f2f8408148792e0eb6c269a89261146a593a8237c70102173e7cdba1409ed264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C90 13544 bytes

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