Malicious PDF — malware analysis report

Static analysis result for SHA-256 a796edc116ae04fa…

MALICIOUS

PDF

62.5 KB Created: 2020-09-06 07:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 501d2fab748ac37a1e5f3e496355615f SHA-1: cb89d49113243303f9374c097c6493b4532a1bee SHA-256: a796edc116ae04fa361e8e1b241d14efb7270ea7556b0c3827d77c7ceef39fea
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and static.usrfiles.com. One of the primary links, however, redirects to 'ttraff.me', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the document's purpose is to drive traffic to this malicious site, likely for further exploitation or phishing.

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.me/wix?keyword=acneiform+eruptions+pregnancy
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/catan_cities_knights_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/fadejeranazebewaniroxutak.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/81682090342.pdf
    • https://static.usrfiles.com/ugd/52b593_28b62be076c64ce091bd802b9c71fd95.pdf
    • https://static.usrfiles.com/ugd/3bcfef_9ac2590dac7b4dacabbf3051a788d9d8.pdf
    • https://static.usrfiles.com/ugd/dcbeda_167487464a8e43e8ab9eb5d9b909328e.pdf
    • https://static.usrfiles.com/ugd/912de2_3072c64696454343b5ea4d301db2c5bf.pdf
    • https://static.usrfiles.com/ugd/b58d21_f43de837258c4e288d0133e293be6283.pdf
    • https://static.usrfiles.com/ugd/ddb60a_d32eed8db3654f3493539547a24e445f.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_off0000b2bf.bin
3f2ed114e2761136cf109b2e6e7c54484b99fce4624b1037cd5f1478fec48e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BF 5392 bytes
font_01_sfnt_off0000c510.bin
81d4f3517e6a06cd798c140246eb0302eb753a254baa47b9a3362c49fff12514		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC510 12540 bytes

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