Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c4f4bf28704aaf…

MALICIOUS

PDF

35.7 KB Created: 2020-08-31 22:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6714e541311d8c6bab98b0b201fa71d7 SHA-1: 0bdcac52c8821d49b37ae2fcc434c7fdcc336078 SHA-256: f7c4f4bf28704aaf6817f9ccfe316f2c850636e1e7235be47f043347df8b1bd3
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to trick users into clicking the malicious link, likely for credential harvesting or malware 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.ru/wix?keyword=bituthene+5000+data+sheet
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/adobe_acrobat_standard_dc_12_2020pdf_windows.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/hallelujah_sheet_piano.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/xekobezuluzi.pdf
    • https://static.usrfiles.com/ugd/9219f8_f6df1da3bb0b492486ba5866cb4a7ec6.pdf
    • https://static.usrfiles.com/ugd/91e123_01c0569cda184c4bb7b396a68ffb8242.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2a9a602e43c4a968887a957642c7d41.pdf
    • https://static.usrfiles.com/ugd/f84671_c206e6bfaed540678d10ddef37598807.pdf
    • https://static.usrfiles.com/ugd/c068f8_d7520036d22748c285dd84bc6737964e.pdf
    • https://static.usrfiles.com/ugd/b8c837_901166200ca84c9492832501ae1e2cc4.pdf
    • https://static.usrfiles.com/ugd/38bf1f_abdc07fb5f4d483291a5b54bd82b0848.pdf
    • https://static.usrfiles.com/ugd/286fb8_91fa438cb38e46869170fe4a68310647.pdf
    • https://static.usrfiles.com/ugd/8c0e65_a1748a4fb52f4694baa7d0417d67d429.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_off00004d52.bin
90182803cce8494295977ba5304854b0db31c71835977fb93dc31087cc827a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D52 5100 bytes
font_01_sfnt_off00005eb4.bin
080e581ec8a6bf248f15641f34afec72d4602b67f724f06f8f62adc4b0004ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 10544 bytes

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