Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e93b6c96194cda2…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 00:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f418b57cb35f2ab8696e18833840d1a SHA-1: be846b9e5d3be07dbc3f76396e19012e16b776b2 SHA-256: 4e93b6c96194cda21a61c4f6dd931c7809d3dbeb28d019b0b493fd9c0b115096
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, includes keywords related to 'Dorsey asset management performance' and the authoring application 'wkhtmltopdf', indicating a lure to a malicious site.

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=dorsey+asset+management+performance
    • https://cdn.shopify.com/s/files/1/0452/1033/7440/files/32838397002.pdf
    • https://cdn.shopify.com/s/files/1/0432/1116/1768/files/62734686778.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1596/files/hidruro_de_oro.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/mahiki_drinks_menu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/wosemawetuvukajutuxusilog.pdf
    • https://static.usrfiles.com/ugd/b8c837_f62fa2c5847546c7a0229e23673290ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ce9fba7b8f487da62bb35dc16ce0a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_230e54ad78f74a5ca0fe52ef384afac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cde38818a04cc583ac053270201db2.pdf
    • https://static.usrfiles.com/ugd/b8c837_718f5aa6ad314dbf956a23250d9ff214.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/38524738629.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/xofaniri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/anemia_in_pregnancy_thesis.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9fe2f5800e94b7dbf78fdecd968d284.pdf
    • https://static.usrfiles.com/ugd/b8c837_76aad2d728b14300a16c97fce72db967.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc11c3a676642a194389e4fea123cbc.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_off00006638.bin
aabddce02dbfd5059dd22e1845b75d50adf3e9e644bbe9a2625a8542e96907a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5404 bytes
font_01_sfnt_off00007893.bin
969e83b73c4c4719acc9eff0589a714c50362fb62297fa5a9e613384afb29207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 11284 bytes

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