Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47d8e75af63763e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 10:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dceca645265425c99473827b007971 SHA-1: 0e54bb85dc0b0ddd51785f0f01621c50505a6298 SHA-256: d47d8e75af63763ead7116eb52670fb09caea170468e695ef123e29eb0de4827
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to distribute malicious content. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted from this sample.

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.cc/wix?keyword=object+oriented+programming+with+jav
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/8070685841.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/viguvakazivukobitesap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/200349851.pdf
    • https://static.usrfiles.com/ugd/ea2f88_da13fa50bba64050a3e3237e506269f8.pdf
    • https://static.usrfiles.com/ugd/2ac701_25224fe7c3e0406c877fba83f4d06d69.pdf
    • https://static.usrfiles.com/ugd/b8c837_013d51f8434549aa9d242b3c5c66603c.pdf
    • https://static.usrfiles.com/ugd/ab0441_8c2a440c60d749fbb1791e122b81dd72.pdf
    • https://static.usrfiles.com/ugd/b8c837_d14c48d4c1664a3da4a58274d6d36e87.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17f86de185d4dbb85c88ce5c9e47c2f.pdf
    • https://static.usrfiles.com/ugd/c1de29_212a38eb3bf842bba6db2024936270a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a23b6ba8c2334f3d8b7f48d618d097d6.pdf
    • https://static.usrfiles.com/ugd/9904c2_591ba47ded7549ffad82af317acb1a84.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_off00006722.bin
c8ba0f7c0c5f412387e476fe178e35646ba92072fbbe9aa4ee7bc421c41d2251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 5672 bytes
font_01_sfnt_off00007a55.bin
2dcc5ef72df57083760853c1767ab427565c628d35b1ff21f99c88dad899ad0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 10148 bytes

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