Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ea28a548c394f0…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 04:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5bc4f4628d47cefd57a5e15c63e46e SHA-1: e1385712cd750886f9fe4576f8c1fcdde46eaba0 SHA-256: 23ea28a548c394f091c5488434f9851727e35223bc7cddeb06867b1cc994971e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=theological+dictionary+old+testament+pdf', suggesting the document is designed to redirect users to malicious content. The document body itself contains garbled text along with the same suspicious URL, further reinforcing the malicious intent.

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.cc/pify?keyword=theological+dictionary+old+testament+pdf
    • http://files.bannisterrunning.com/uploads/1/3/0/8/130874026/7915608.pdf
    • http://files.professorpricklethorn.com/uploads/1/3/0/7/130775897/bezinazidix-mubunom.pdf
    • http://files.hipsterleaks.com/uploads/1/3/0/8/130814774/4594820.pdf
    • http://sifevip.ghvmsband.org/uploads/1/3/1/4/131452976/ef20f4cf29b2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/jojuboxudipoderivijodan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/sevibupesokofog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/38148901590.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/79608147772.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4684/files/27406206088.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/bewan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/zugojajajefoxuvenodeja.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/chemistry_formula_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/copy_file_path_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/redupizifivobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/visajijipixis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/timozibanogesasemorufuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/wokolaxug.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_off00006c93.bin
e85f5e34af809542a5b5b021480ae6edddf5506418aea5ba3e5fe8b0e630bc7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 5620 bytes
font_01_sfnt_off00007f8e.bin
d0b39e0ac3d9579582ede5e1f8a138db8c9ff0756e8f7a8bf58cbf0ddbebd7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8E 9896 bytes