Malicious PDF — malware analysis report

Static analysis result for SHA-256 408f57f3d7a03cad…

MALICIOUS

PDF

59.3 KB Created: 2020-08-30 17:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e4271a83b320a4e7ee359b0133a16ab SHA-1: b0bac321a3d60efdead5ab1e6f84c2d725cb0d48 SHA-256: 408f57f3d7a03cadb8dca0da3e85cdebcdc820a9dabf7da2b846842653df8ee4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=diep+io+masterov', which is flagged as malicious. This suggests the primary purpose is to redirect the user to a harmful site.

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=diep+io+masterov
    • https://static.usrfiles.com/ugd/5fd5c1_e8265665ba0f4b24904019a53d6e8e68.pdf
    • https://static.usrfiles.com/ugd/96768c_188358738e494dac80474788ee9ef241.pdf
    • https://static.usrfiles.com/ugd/b8c837_f25029c95b1444699c610ca0f4363698.pdf
    • https://static.usrfiles.com/ugd/b8c837_76426c93836a446db7be881da02757fc.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/26803756947.pdf
    • https://cdn.shopify.com/s/files/1/0435/9654/6216/files/gegeguvorigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/73773129309.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/robert_quinn_contract.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/parabezunevototixinusekav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/73832503587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/tutu_app_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/half_moon_serenade_piano_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a15d.bin
218615c96ca80467247facc766f9c2f2584948c92711c8aede41886f3cdaaaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA15D 2984 bytes
font_01_sfnt_off0000ac0c.bin
798e9aa407c8015210c681a135a4fac42d59300f0942dc0e089626ae4a4e4903		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0C 4992 bytes
font_02_sfnt_off0000bcf7.bin
f5951e9bba034519e283aa0687b6ae01792cd5dec83ca094d467fb9f23f0b30c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF7 10356 bytes

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