Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5c5e417c89be03…

MALICIOUS

PDF

34.3 KB Created: 2020-08-29 21:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4655e7b18cab682d8f8e4a9570c5ee0a SHA-1: f3a82dcf0fece12104009fd7eff0bbdd3866a418 SHA-256: 3f5c5e417c89be03847be63b88b8f8d35423f2f45ea9a7469784a0b6f700255d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a manual. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on 'static.usrfiles.com'. The primary malicious URL is 'https://ttraff.com/wix?keyword=delta+wood+lathe+manual', which likely serves as a gateway to 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.com/wix?keyword=delta+wood+lathe+manual
    • https://static.usrfiles.com/ugd/b8c837_d51f0409b5254051a863753429337874.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8f712bf44f749ec92edee12670674e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b84c6da799b543d1a62975f5d6b26b31.pdf
    • https://static.usrfiles.com/ugd/b8c837_5784fc09946c43cf9efc5ff985258230.pdf
    • https://static.usrfiles.com/ugd/d17951_321948676b114db78a73bcff461d58ec.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/mortal_kombat_snes_move_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/hp_deskjet_2546_manual_de_instrues.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/joranaden.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/nemumon.pdf
    • https://static.usrfiles.com/ugd/b8c837_9924ba6f3a9b4606930d5e5cfdb9bdef.pdf
    • https://static.usrfiles.com/ugd/b8c837_1162317c14554f669c70318841d2fa1e.pdf
    • https://static.usrfiles.com/ugd/299074_652524c351a14a3bbb9726350c54df14.pdf
    • https://static.usrfiles.com/ugd/a1fb72_d3145f4ccf344795a05c38109f5205f9.pdf
    • https://static.usrfiles.com/ugd/2c8d66_1f27c3aba0a94fe3b2a5fe3eaaf8dbba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/65092734225.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/html5_cheat_sheet_2018.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_off000048d4.bin
df774710e527ac4feacae2ad9ea15dfe07f5a72d89f52fd53808e00d9132424c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48D4 4884 bytes
font_01_sfnt_off00005961.bin
521badef15a7aab84ca732bc6c1f8061579721190682348e90c4e87de649d1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 10028 bytes

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