Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5e3a0bae8abf40…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 09:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a661b5c5d92f9c996dc49965f433c4a0 SHA-1: fde0080c61c84f5ac48a0fe8dda056ab0e768c59 SHA-256: dd5e3a0bae8abf40c6eefa246a3c72d9c1e696267685a1ab7cb89026e3b981df
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=michael+talbot+-+the+holographic+universe+pdf+download'. This indicates the document's primary purpose is to redirect users to a malicious site. Additionally, a heuristic for a PDF link farm was triggered, with 24 external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to book downloads, reinforcing the lure.

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.me/wix?keyword=michael+talbot+-+the+holographic+universe+pdf+download
    • https://static.usrfiles.com/ugd/df4650_b40ec9f264154f13add2b74c3f20853f.pdf
    • https://static.usrfiles.com/ugd/5e81b9_db2d95bcfe32429abe531b9bcf9c3fa4.pdf
    • https://static.usrfiles.com/ugd/a298ce_4caea981ca2c4294a1c250101876e3ea.pdf
    • https://static.usrfiles.com/ugd/15cd4d_1104b22120fc481c860243463ac26a57.pdf
    • https://static.usrfiles.com/ugd/0df15e_6391d4e3be1e42a4a5032488b6943dc7.pdf
    • https://static.usrfiles.com/ugd/0d089b_ae47bf7ff1894d14b3d0e526540a133c.pdf
    • https://static.usrfiles.com/ugd/ea2f88_a31b6df1dbae4d45ae21cf55b4145945.pdf
    • https://static.usrfiles.com/ugd/b8c837_b62c544c6b27459db7f4b7e1f6e53453.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/casting_defects_causes_and_remedies.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/apps_android_screen_dimmer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/biscuit_making_process.pdf
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/sorugogejubor.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_off0000561d.bin
2505f490731a3448660fc855ef27a7bdcb052643b1e1c1b8cd3e29103c1283fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561D 5748 bytes
font_01_sfnt_off000069b5.bin
74738b645cc5a42b738311aac78c4eea0c2717c65bc5c1981b60b9f4662308b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 9928 bytes

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