Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a5c6a6ab9a6b2a…

MALICIOUS

PDF

35.5 KB Created: 2020-08-29 23:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f997d77e48f82175393e969a0a5d5e3 SHA-1: 2f75b9226f9dcdbdc7d58bd38b34fb51459f7e0f SHA-256: b1a5c6a6ab9a6b2a68e85e96c44d79630aebdd59e3be028819686632c15a984c
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, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/wix?keyword=map+of+europe+before+ww1+and+after+w', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a lure or redirection mechanism. The primary purpose appears to be directing users to potentially malicious or SEO-abused 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.cc/wix?keyword=map+of+europe+before+ww1+and+after+w
    • https://cdn.shopify.com/s/files/1/0438/4948/2400/files/pugesuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/cash_luna_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/37609928684.pdf
    • https://static.usrfiles.com/ugd/b8c837_40d1519768de4423a4f0c07f2cd1766f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cca151932c04f19ba94db3104cbf18e.pdf
    • https://static.usrfiles.com/ugd/b8c837_52c798d45fcc49cb8b97440d9fe54b1a.pdf
    • https://static.usrfiles.com/ugd/a1fb72_0a19f3856a1142a38ab382124a3e5d9c.pdf
    • https://static.usrfiles.com/ugd/12f4eb_fdee34894e8b40ee8084787fd414ede4.pdf
    • https://static.usrfiles.com/ugd/b8c837_68e07adc3cec48a5ac8e7386976720b0.pdf
    • https://static.usrfiles.com/ugd/8cbfce_8fd7af686ef64cb385b9f7fd2315d2a6.pdf
    • https://static.usrfiles.com/ugd/3aee12_b6f3111145ce4a7490c3ae94b8b796ec.pdf
    • https://cdn.shopify.com/s/files/1/0437/5111/2858/files/system_functional_requirements_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0462/6966/1335/files/answer_key_focus_on_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/welinoxoromuwutizefawole.pdf
    • https://cdn.shopify.com/s/files/1/0451/6475/7146/files/80395619222.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_off00004d49.bin
f2557462497832899a753c3bc87386ad5317bf2dd6ed42666b358394c3fcc42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D49 5116 bytes
font_01_sfnt_off00005ed5.bin
7af2bb2b121ee7964bbc370bc31695d32640a7f4bb8ec056334ffd49a15fe877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 10132 bytes

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