Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a348eb6269b0a8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 00:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73eba0bd4f7156fc2e455cf5d69376e5 SHA-1: 6c6754f877cbe8270f1cb58f25ff44a8a8668d21 SHA-256: 51a348eb6269b0a8ecc2f2a7a274f280ddbadfb8ff72f08445162562e24a8348
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, characteristic of a link farm. One of these links, https://ttraff.com/wix?keyword=warriors+orochi+3+ultimate+ps3+vs+ps4, is flagged as a known malicious redirector. The document body itself is heavily obfuscated but appears to contain the same URLs, suggesting a coordinated effort to drive traffic to potentially harmful sites. The primary attack pattern observed is the use of a link farm to lure users to malicious destinations.

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.com/wix?keyword=warriors+orochi+3+ultimate+ps3+vs+ps4
    • https://static.usrfiles.com/ugd/b8c837_ad7635ca5d5647d497cd863b6d901433.pdf
    • https://static.usrfiles.com/ugd/735189_84e076bc5a3d4a78bcac464e900cf993.pdf
    • https://static.usrfiles.com/ugd/429b25_be031c44ee6a4b7ab3a641ffc0da5e6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8842bec2de24456a8403725306eee8f.pdf
    • https://static.usrfiles.com/ugd/0789d5_a682fa325ace46e597a87538817ff5e5.pdf
    • https://static.usrfiles.com/ugd/36f25b_f23686e003bb40438666d72a80402545.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/jutovabevojezanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/how_to_setup_act_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/sepetegoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/vapuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/hotel_california_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/watermark_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9259/files/basic_electrical_and_electronics_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/gikukebowinuzafu.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_off00006360.bin
301e9d29b630d07b3e66479a2812adc1af839f6c8207b1f1273072b1a89d3571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 5496 bytes
font_01_sfnt_off00007605.bin
26847eeec300c6321bb4cf4bb741bb7a1d24263772fc298c242cec28e51b2068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 10548 bytes

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