Malicious PDF — malware analysis report

Static analysis result for SHA-256 3326805a66539c30…

MALICIOUS

PDF

54.7 KB Created: 2020-08-05 04:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04cd80c47c6c05d43fdb011ae08f240e SHA-1: 7255f8c7738ac579011738a10acd4f007ddd6dd5 SHA-256: 3326805a66539c30fabb99cfdcbd2044df738e9eedcf3bcaae2e6a33131ac865
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or spamming operation. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector, likely intended to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=spanish+colonization+in+the+philippines+summary+pdf
    • http://tujokud.pacificplacesf.com/uploads/1/3/2/3/132302780/9464198.pdf
    • http://files.undauntedcolorguard.org/uploads/1/3/1/4/131407138/8668279.pdf
    • http://files.pelletgrillcentral.com/uploads/1/3/0/9/130968921/vapenavided.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/58109124671.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/48592161849.pdf
    • https://cdn.shopify.com/s/files/1/0435/4677/1607/files/wubuxumotuvug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/3642439281.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5790/files/60715565652.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1809/files/didinigata.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/juzabinidujugaxoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/83421664969.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/josegegunasurawefetara.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/22015142934.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/pudedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/76506704129.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_off0000979a.bin
3fe7c61aa5e79d8ec1e80b17fe8b6e59c554c04475c3cff1a54e2a272544e553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x979A 5652 bytes
font_01_sfnt_off0000aab8.bin
a904d26ea8f08f80eae9c58db4e386ae1953061bcdae805ff723205020a83697		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAB8 10160 bytes

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