Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c235f116c4fbeb9…

MALICIOUS

PDF

57.5 KB Created: 2020-09-08 08:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e65849021a6a0cfc1396316fa02b14a SHA-1: 347ed50e881b3540c6f746eef2a2e119dd3834df SHA-256: 3c235f116c4fbeb9aea97c3f6aa8706ccc8718fddd8a466a08b768073cef3132
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'React js tutorial step by step pdf' and the malicious URL, suggesting a lure to trick users into clicking. The PDF_SEO_LINK_FARM heuristic indicates the PDF contains numerous external links, likely for SEO manipulation or to host further malicious content.

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.link/pify?keyword=react+js+tutorial+step+by+step+pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/7_traits_of_highly_effective_leaders.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/59110570909.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/litobux.pdf
    • https://static.usrfiles.com/ugd/9e53d4_8c2533ed26824040a5128b946a83126a.pdf
    • https://static.usrfiles.com/ugd/fdee49_7c6eb035607b4befb960214ca0876b9c.pdf
    • https://static.usrfiles.com/ugd/8a419d_371d9e39449a461aac11633ca6d6760c.pdf
    • https://static.usrfiles.com/ugd/faa7ef_46d5350500ef455093896e4508ce185d.pdf
    • https://static.usrfiles.com/ugd/9eb187_df999d33e64e456c912be647322aa903.pdf
    • https://static.usrfiles.com/ugd/0e6328_795945c92bfb4ecea34589c6d0f5dcf6.pdf
    • https://static.usrfiles.com/ugd/808cd0_05492dd9c4f447a59dda32433f385fc5.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/sotuvavudokapibopoxoxige.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/84716389657.pdf
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/tobonojobedipotisid.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2485/files/vosobavijifebi.pdf
    • https://cdn.shopify.com/s/files/1/0461/9668/6997/files/lightroom_presets_free_zip_dng.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_off0000a12a.bin
47de6a4fbbbfca5e421c802329c7d24c7d9dd3c7fdc7c8af138882ac66f5526d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA12A 5472 bytes
font_01_sfnt_off0000b3e1.bin
6ce38a90e58174ad1acf7e1b1cd1049ebf40f39d9ab24cf2e8b17632efc0234e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E1 11216 bytes

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