Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fed57a12bc78dc…

MALICIOUS

PDF

52.0 KB Created: 2020-08-30 22:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9306d2d72c0d95f631981160e7643dea SHA-1: 473d380f7e41d5ea2089bb4a9463e4069de03ca3 SHA-256: 31fed57a12bc78dc1431e6bc437e167b454f5f1fc931e29fea5dcd928f62ae7d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Ins

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, https://ttraff.cc/wix?keyword=read+the+bible+in+6+months+chronological, points to known malicious redirector infrastructure. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's a crafted lure rather than legitimate 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/wix?keyword=read+the+bible+in+6+months+chronological
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/saira_narasimha_reddy_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/menavudav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/vufifekezos.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1675/files/xoneg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/86436028083.pdf
    • https://cdn.shopify.com/s/files/1/0458/6271/5545/files/fefopubilurozupebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/xujulinupoloki.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/45910907457.pdf
    • https://cdn.shopify.com/s/files/1/0453/9875/3448/files/movofapezimomuwovomofone.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/chuyn_file_nh_trong_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/76949380453.pdf
    • https://static.usrfiles.com/ugd/89363e_f4a290e104f64580be360a6f025f9108.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a694811ad564bd38b965194c57d12a1.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c80.bin
9e8310fc3f31d0c0dc6a3beec73cde76688ec4a30f1b30a47ad2246d88fa80a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 5652 bytes
font_01_sfnt_off00007f7b.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 1800 bytes
font_02_sfnt_off00008808.bin
6c0e332a9fae84d0c7d9063a82d07fd45a7d2518887c56f867f2c880c4e4ac39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 10984 bytes
font_03_sfnt_off0000ad1a.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1A 16312 bytes

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