Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ebfa7332ece7ae…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 11:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92bc25af46f4faa9b0514d48dd749210 SHA-1: d79c3126d255ed8202b8ceb7ced893335e4631ff SHA-256: 45ebfa7332ece7ae9ecd86900fd3ff4e69a4a4e7c561f355a0cf09722db283f1
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a PDF download. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm designed to obscure the ultimate malicious destination. The primary malicious IOC is the redirector URL.

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=ate%25C5%259Ften+g%25C3%25B6mlek+%25C3%25B6zet+pdf+indir
    • http://files.loco-loko.com/uploads/1/3/1/4/131453847/fukejimuw.pdf
    • http://suziralov.thairicespoon.com/uploads/1/3/1/6/131606490/zalexivet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/zudanowuzuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2201/files/badifobazetel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/sitivuzaginofika.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/14228248340.pdf
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/87694100777.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/4367687039.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/32722823560.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/79928256997.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/41525914525.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/fumifikagozopebufukox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/diagramme_de_bode_second_ordre.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/senior_sales_manager_job_description.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c3.bin
37c6a87eb4863978fb34b837246dcb5bfdcdf666d33d5cbe00b9b5c681a137dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C3 5140 bytes
font_01_sfnt_off0000732a.bin
d1888e1ca1a3b9c378a1abfa27d2129537c44f3e9f1716c81ec7a6955e27e467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 12172 bytes
font_02_sfnt_off0000976e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976E 4324 bytes

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