Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6d04cacdb65e3d…

MALICIOUS

PDF

38.4 KB Created: 2020-08-23 06:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03bf86e82b03e914dc2eb797d641f738 SHA-1: d266eb56ca24232d24645df9727fd09e4e8d078b SHA-256: fd6d04cacdb65e3dc73acb7acc24f69679b37f8c115d11b0c44fdca755f3c41a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body is heavily obfuscated but contains the primary malicious URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic, likely to drive traffic to malicious sites or to obscure the true 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.ru/pify?keyword=reporting+contingent+liabilities+gaap
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdf
    • http://files.pacificbrows.co.uk/uploads/1/3/1/4/131454286/3c8bdf7478116.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/3d_max_autodesk_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/luwanuwoxigele.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/56406570069.pdf
    • https://cdn.shopify.com/s/files/1/0461/3328/0921/files/xerelezijisutarotunixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/jegadigijebubepijarezufut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/tizoketazedozum.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/fuwirazoxowivuxonipidob.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6528/files/postknight_guide_stats.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/sumefad.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_off00005937.bin
a5f63c352fc8d602e585dfc5d0617a4db70907e532edafff6bccc8cafb4d8e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5937 5248 bytes
font_01_sfnt_off00006b24.bin
869030c892a7a55e76f20877b0bdaef194355bdb61149fdd68a41a353fbf12ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 9892 bytes

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