Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51ef3bdb806d14e…

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 18:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424ec0d619bd301ff974679f4968a966 SHA-1: dcbfeec9781c2844a0c7cb3e8e3d8f0e0868774f SHA-256: b51ef3bdb806d14e72fbc8040a62c1e66280ee61d5d98ac70089c77ad5e12207
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to domains associated with link farms and redirectors, such as ttraff.com. The document body, though heavily obfuscated, contains references to 'Chicago manual of style reference' and includes the primary malicious URL. This suggests a phishing or malware delivery attempt disguised as a legitimate document.

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/wb?keyword=chicago%20manual%20of%20style%20reference
    • http://files.stmarync.com/uploads/1/3/1/3/131381288/janifexi.pdf
    • http://files.vanessa-culver.com/uploads/1/3/0/7/130775506/lekibimajobisun.pdf
    • http://files.mercermovercompany.com/uploads/1/3/1/4/131437513/5865199.pdf
    • http://jozelo.courtneytezeno.com/uploads/1/3/0/7/130776885/repef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/tupexilegor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/segonalifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/xajubamulasajotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/windows_7_iso_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/98138114547.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/12192893801.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/bomamarilatakeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/zovemobegebimoxedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/32652237043.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/nosivisorimuvinanatefaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/bonilu.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_off00005f3c.bin
41847ae48d01adb088023cb052fea4e94c1e2e6908897cce9ee731f553168c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 5300 bytes
font_01_sfnt_off00007127.bin
a73b690e25d0da86a0109cc62175e3b1301dccf6554b0cb109c91d1e39db92e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7127 10060 bytes

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