Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a823a5d8357995…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 20:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72bac0a5fe03de42567041cea32b585d SHA-1: 7ccf538c6191ec4e906d3e12f1027b18cf058c9c SHA-256: 94a823a5d83579957a375497636cf7d538e7e4780aad4305440409c60996fec8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=describe+how+the+heart+alters+stroke'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign content, likely to mask the malicious redirector.

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=describe+how+the+heart+alters+stroke
    • https://static.usrfiles.com/ugd/b8c837_3a681eaa6a8743ada9e2a1290be22c28.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8e4ae36c5374a73b9f1ceb5e9ffd61c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff64073e6f094029b9ea28720b173fae.pdf
    • https://static.usrfiles.com/ugd/ac72e0_a5c9ea41332841d5af7e9efd76c3b0a9.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/exercicios_resolvidos_sobre_probabilidade_8_ano.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/kopoveruve.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/metabolic_syndrome_and_related_disorders.pdf
    • https://static.usrfiles.com/ugd/d54300_036459a8281b4588bf91f2e8f0e38807.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc7fd14f55584cf981a041432a1bc95e.pdf
    • https://static.usrfiles.com/ugd/e8506d_da48a6c3b88b42308afaeab0d0a643cc.pdf
    • https://static.usrfiles.com/ugd/bae363_6401343a8aa541ac854d790e1aeae52a.pdf
    • https://static.usrfiles.com/ugd/6924eb_e0092522b8c74f49936cf2946a5e47a3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/fekalenadibevabexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/72994482583.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/tutinitaru.pdf
    • https://cdn.shopify.com/s/files/1/0438/3204/9824/files/nefufijererabinusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/xakodalevonixo.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_off000061b2.bin
2d4990ea4868d49d172b7015f80647859a3a413a78cf906b271aa45023d2c8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 5180 bytes
font_01_sfnt_off0000735b.bin
96f6bbc87e42ecd8b1ee3b19ddb36f1927b3b8463244d72fdb03e18d6ba1aedc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 10000 bytes

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