Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3831b91a838a20c…

MALICIOUS

PDF

39.9 KB Created: 2020-09-01 17:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fedf50f465651319fbee14afc05945d8 SHA-1: ebacd204fba2edb97891ca7a05e592c429819598 SHA-256: f3831b91a838a20c54b51d8a05e530e795157d87f2ad1f622e6b87278a49c67a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites. The presence of a link farm indicates a potential SEO poisoning or traffic generation scheme. No scripts were extracted, limiting further analysis of payload delivery.

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=bolero+mein+song
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/new_army_green_service_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/niriguzazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/stihl_031av_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1918/9915/files/relaxing_piano_music.pdf
    • https://static.usrfiles.com/ugd/5438e3_a4224cf89c3741beb9d338476caefe8e.pdf
    • https://cdn.shopify.com/s/files/1/0430/2582/5955/files/oracle_database_12c_sql_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/zoramugotebaxowifedaleli.pdf
    • https://cdn.shopify.com/s/files/1/0430/9116/5333/files/zunetojifamubes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/xuribelopifenuwurutebur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/nejusumekegituwekotobev.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006289.bin
077b41edc06ce5fb3ef6fc8feae89e2b1ffc8eb1df9d0b74dcaa346a11208fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 4844 bytes
font_01_sfnt_off000072f0.bin
80930b3daa0ad30877cd71388a04e97f404539ac186f4c3025871fac2655f347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 12856 bytes

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