Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b706fee5af0311…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 01:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc63eee3f84c4ad5fc111001dc98c1e SHA-1: e41f5cd88688b9b4d58ec82037b46b069515ffce SHA-256: 37b706fee5af031150af1367d12c9b0cc0abe85c8a86294b83e078f661591c12
140 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating a document signing service, likely to trick the user into clicking a malicious link. The embedded link `https://ttraff.cc/wb?keyword=electronic%20signature%20pdf%20mac` is flagged as a malicious redirector. The document also contains a large number of links to PDFs hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector. No scripts were extracted from this sample.

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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/wb?keyword=electronic%20signature%20pdf%20mac
    • http://tiwopo.katelintours.com/uploads/1/3/0/7/130739204/lusapemevid-beliw-jukexeso.pdf
    • http://radiwi.gemwomen.org/uploads/1/3/0/7/130740072/6609032.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/43214912549.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/pinuvexifu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/guwozupan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/17700683804.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/61170518915.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/51764193855.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/guide_des_bonnes_pratiques_cliniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/zuguna.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/arraylist_two_dimensional_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/podokidalipupozovujepe.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_off00005fc6.bin
330ce256d6224dee6eb8a4611b2003a508f4e6576082e6a90ecc3974c6792293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 5432 bytes
font_01_sfnt_off0000722a.bin
322b5325c516cab448469daba3671bd2ca82a332d83ed88613a9265c7bb69e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 10088 bytes

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