Malicious PDF — malware analysis report

Static analysis result for SHA-256 8492a83053163fd8…

MALICIOUS

PDF

44.3 KB Created: 2020-09-06 10:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7db63701462ee9198c08193f5533b31b SHA-1: e389db9b6a1e8101dd7c5601d414c18553af5dcf SHA-256: 8492a83053163fd8350eee057f3491d44c8949be37febab2671801d6b40d61b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, indicating an attempt to direct users to harmful content.

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=phytophthora+dieback+management+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/71847699428.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/wejepafabomopedepo.pdf
    • https://cdn.shopify.com/s/files/1/0443/4948/9308/files/atividades_de_alfabetizao_para_imprimir_em.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/algebra_nation_section_2_topic_3_answers.pdf
    • https://static.usrfiles.com/ugd/238140_2f19f58c88fc444ca5a716cdbe146ea8.pdf
    • https://static.usrfiles.com/ugd/b80405_f6d27a7a24e646c596893dbdd113b868.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c1c7f912464944b0ff6b432dc6a691.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/newupobilorarafujebuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/xiritalasabopofujeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/41999368704.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/5480360112.pdf
    • https://cdn.shopify.com/s/files/1/0439/2130/9851/files/nuwejuvaxewimina.pdf
    • https://cdn.shopify.com/s/files/1/0463/3342/7873/files/66214658521.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/filemaker_server_16_installation_and_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/xudinolupixewa.pdf
    • https://cdn.shopify.com/s/files/1/0447/0436/6748/files/67321721233.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_off00006bad.bin
1ca9307fd9d5bc5cf2ee7b376c3a64f2bd8ab5fce583e4caf615989e89dbb3e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAD 5616 bytes
font_01_sfnt_off00007ea0.bin
6d92396ed4ac497901390986e9f991a09acf2715905d0a09d26bececa856e08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 11228 bytes

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