Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd8e19845ad509d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 15:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4924a5a2f14710c5b8f91c6a981409d4 SHA-1: 6abc56541b13d515310f5401d2568bf5bf7a12cf SHA-256: 2bd8e19845ad509d1b27c1a8840872b3280591064ae948916c24f0055abc3a55
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector heuristic. This suggests the document's primary purpose is to lure the user to a malicious site via the embedded link.

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/pify?keyword=investment+valuation+damodaran+pdf
    • http://files.erasor.org/uploads/1/3/1/4/131438073/7b41b4f798985f.pdf
    • http://files.thedantreks.ca/uploads/1/3/0/8/130874633/a5c44287.pdf
    • http://files.bridgehousesarc.org/uploads/1/3/1/8/131858481/xagez.pdf
    • http://files.jackblairgray.com/uploads/1/3/2/6/132695714/05c633.pdf
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/30813487209.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/7598363672.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/difanewazopozizibov.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/52747160914.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/83794927371.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/94971007639.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/paxuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/22202612396.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/lopegizodibadadunenowamim.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/54776479408.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/wow_legion_druids.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/welaxutemiwe.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_off00006f08.bin
be0ddfd29ba1607465691df3666f7506ddf421c7733b5f13eed8d34c8ae53522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 5184 bytes
font_01_sfnt_off00008095.bin
40d501a26699adb17b91e875c54ad23e81e57339608d18dd9a9868c93b9ef1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 10716 bytes

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