Malicious PDF — malware analysis report

Static analysis result for SHA-256 69252029dfadb7bc…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 22:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42a0fca9f40d0356c23962209c2eec10 SHA-1: feb48ed22309fed2a6131362ba1e7ec10b633edc SHA-256: 69252029dfadb7bce7765510d218327d36ce2d40f9dbb679b893e4b210366ebe
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=iadc+space+debris+mitigation+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/71200577618.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/80984710740.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/nivuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8723/2166/files/75660730115.pdf
    • https://static.usrfiles.com/ugd/b8c837_34b2f58a8e744f6796ab3ceb610d4ea2.pdf
    • https://static.usrfiles.com/ugd/b8c837_abc924ab436a478fa42cac534a7d5361.pdf
    • https://static.usrfiles.com/ugd/764aaa_c24f0a6691a84798b2b0f04919687915.pdf
    • https://static.usrfiles.com/ugd/b8c837_77f99552bd324721b20f93e892f0c36b.pdf
    • https://static.usrfiles.com/ugd/74e905_e3f95a8b17ae4f28b576d4ef4f5cb953.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69a25be5569414c8ca8b10054670f96.pdf
    • https://static.usrfiles.com/ugd/824332_b4a4c7a12a3049159a5903cb7803c15e.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/24677140866.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/staheli_ortopedia_pediatrica.pdf
    • https://cdn.shopify.com/s/files/1/0455/4014/7365/files/quantum_analyzer_software_free.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f3.bin
c858a8497af59df3eda5f5d7106c5424271dd55ab5deabb63942c9ecdcb2128a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F3 5472 bytes
font_01_sfnt_off00008769.bin
e1d3f6ea3bd1069d567a5091107c8dc14706d52178d5b904b0a81275e9f01dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 9952 bytes