Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b1e94b415901c8…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 18:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49105e2a31bca9c187dbf3c5118d8198 SHA-1: 6e705929198c9cf854538c440a9679d4c9692c14 SHA-256: b4b1e94b415901c89904d9fbb04910ba149b805ac489db4d7e6f70113094eccb
128 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=bill+receipt+template+word', is flagged as a malicious redirector. The document body and heuristics indicate a lure related to 'bill receipt template', suggesting a phishing attempt to trick users into visiting the malicious URL. The presence of numerous other PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to distribute malicious content.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bill+receipt+template+word
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/25509402172.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/1278995112.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/4839739641.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/vifedesezax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/83743393609.pdf
    • https://cdn.shopify.com/s/files/1/0437/8381/5325/files/emitra_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/mausam_ki_baarish_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/iowa_state_colors.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/suviribefuroretitafoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/23795101386.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1013032ceb64be4bed88212d48d2b18.pdf
    • https://static.usrfiles.com/ugd/5ecadc_b49bc9f6de3143cb94abb9ac828fb68f.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.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_off00006db9.bin
2b25f5f307c86ddbb1869f20d0b67bb47243c1ec696ca9d6ab75aaf76ffae3c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB9 5184 bytes
font_01_sfnt_off00007f55.bin
cef3d16917426e54cf4262ca7044e28268282094fefb55deec883cb8e7e37f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F55 10332 bytes

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