Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dcb7cd37ebce77…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 10:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44b9aaa0e1903f72a8c88f11eb7b3af SHA-1: 515920f906381cc095cc95c1b65781b322773284 SHA-256: 27dcb7cd37ebce7778f8b8e102aaf68c511be3782a81a79410683b8476e965ab
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple Shopify URLs and a primary malicious redirector link. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that this document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=the+righteous+mind+jonathan+haidt+pdf
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/cristianismo_puro_e_simples.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/77422558067.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/42317215268.pdf
    • https://static.usrfiles.com/ugd/e8506d_1b5479f132f0414c911ac0d05c1575fa.pdf
    • https://static.usrfiles.com/ugd/affaa6_aa3bc25e1dc148debd8ca10bf28beec5.pdf
    • https://static.usrfiles.com/ugd/9e41f0_30d4a16f5a8146bdbabe610dd7a1ed1b.pdf
    • https://static.usrfiles.com/ugd/ac72e0_35716e03e0e04122bd5f115f37c5f103.pdf
    • https://static.usrfiles.com/ugd/89c6ad_40df45a5a5184b68a91dc1efa0500f45.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e7907bb8ad34464a06d44978dde9dd4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006045.bin
6fa64f4e43faca32e2bb5fa9a763342c54bbe641784b7a8cd5076f8a20fab6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 5328 bytes
font_01_sfnt_off00007249.bin
48046dae20b174a34df98e695e210d8b7d606c9e1cc2e2edd984018a67de9fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 10172 bytes
font_02_sfnt_off00009501.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9501 4324 bytes

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