Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace999e6fdc87001…

MALICIOUS

PDF

35.7 KB Created: 2020-08-30 10:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7190f084bcf3c947ee92cf1ab6d81096 SHA-1: 44164d92c9d63b3a9b44ce20d924c5c3cb3f4bb8 SHA-256: ace999e6fdc870018a04cc8f6ffd680144dbaccfe5eb11b862239424205e5a65
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector (ttraff.cc) which is flagged as malicious. The document body and embedded URLs suggest a lure to download a PDF, likely to host further malicious content or phishing pages. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate this malicious intent. The file itself is generated by wkhtmltopdf, a tool often used to create PDFs from web content, which is consistent with a web-based lure.

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=astm+e83+pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/pidoguxedagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/32189351877.pdf
    • https://cdn.shopify.com/s/files/1/0463/0183/9517/files/2298139773.pdf
    • https://static.usrfiles.com/ugd/b8c837_62554cc13aa845dcba8afb20289ed26a.pdf
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
    • https://static.usrfiles.com/ugd/d775a9_b5c0ecb8befc4c93bed902d4e301ef9c.pdf
    • https://cdn.shopify.com/s/files/1/0460/7721/4884/files/rodurupulonutod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/kadaxexuradedivobagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/44844242680.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/xetebirofipuzuvosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.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_off00004f20.bin
e7d3d3b08318165a1035de8c1041e067bd54f1b5e084912e40aca3fad328346d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F20 5196 bytes
font_01_sfnt_off000060bd.bin
30dacb672ee3f7b31aa26e8222e6d3a50fa94887dfe1a7d35d092f1f8516cccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BD 9976 bytes

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