Malicious PDF — malware analysis report

Static analysis result for SHA-256 58865b343410d50d…

MALICIOUS

PDF

54.6 KB Created: 2020-07-30 19:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 729e0369f59b7b64be95fa6f975b6bfd SHA-1: c28f0e099f5327a360a23e47f829b2bea43889f2 SHA-256: 58865b343410d50dc977c52ec3fdaf3885e8ab533e3478c13200d75f41f2c620
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains text that appears to be an 'Obc application form pdf', aligning with the lure described by the heuristics. 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=obc+application+form+pdf
    • http://files.centrepointecincinnati.com/uploads/1/3/1/4/131406413/e08b8.pdf
    • http://files.ailantha.com/uploads/1/3/2/3/132303339/risupo_ragudapelufapak_vusop_zuwadafinobe.pdf
    • http://files.dsslearningcommons.ca/uploads/1/3/1/6/131606550/vemepogiramu.pdf
    • http://files.avalonweb.com/uploads/1/3/0/7/130739330/8350599.pdf
    • http://www.anagrasarkalyan
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/madivefebaledazasitiviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/16552736168.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/sapumewedirigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/24724095226.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/tefesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/tetofenijeduse.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/waziwise.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/wirul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/21866902529.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_off00008d89.bin
a59d2e846c47c310429f41a331fc6e07b5d1e7f9ccbf7c2567036a73869a8cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D89 4960 bytes
font_01_sfnt_off00009e35.bin
a3b7e655f102de62a27f2c772b0c17ae7aa4ba08c279bc2f981f5892a296e3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E35 15212 bytes

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