Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59d00d601f99342…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 14:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4985c9ffbefbac4ac0975b7f20ab04bf SHA-1: a2fc02bc78cc7a3fad46a9aecb440aea18ac914d SHA-256: b59d00d601f99342dddbd475af626ebd0f4eab8682599aa01f1adb6cd1cd71cc
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of these links, specifically 'https://ttraff.cc/wix?keyword=conceptualizacion+de+principios+causalidad', redirects to known malicious infrastructure. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it was likely created for SEO manipulation or to obscure malicious links.

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=conceptualizacion+de+principios+causalidad
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/alarm_clock_sound_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/a_b_c_d_song_pagalworld._com.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/there_s_an_app_for_that_meme.pdf
    • https://static.usrfiles.com/ugd/b8c837_25e5364966a24a79aedad58f0850a1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51ec06f23f741599cb469cfad70c3e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3a449a4cffc487d994f167b764bb8c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b359b70a38546b595ae3e3631734627.pdf
    • https://static.usrfiles.com/ugd/b8c837_80af681399124cbe9b894ce3f21d82c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d424ac2844b1474390a801dd8b290f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdf
    • https://static.usrfiles.com/ugd/b8c837_aedd182e2617426d929e71c17f56f1c8.pdf
    • https://static.usrfiles.com/ugd/ba3095_2de2cf17ab7744d494120324d6657860.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb192fea79f455997aa342fe78ed78c.pdf
    • https://static.usrfiles.com/ugd/e3834b_c256e4faa626470f97fef653e7d08c47.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c3427f58f145edbda03a8c7c7d935a.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_off00005f3e.bin
bac816835eebb8f9c2471aa9ed97bb02d58476c9f063e8d4d620c29b58bf3a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 5020 bytes
font_01_sfnt_off0000705b.bin
03ee9366ccc36a8352b144b30a8646eea06459029a8bb82e79e89c6bc8cd8eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 10500 bytes

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