Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ff60e16c7fc157…

MALICIOUS

PDF

41.5 KB Created: 2020-09-09 14:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b354d3df5cc2b3e7d8b4867a93ddc00 SHA-1: d23c10c1891356fcd204fc816971eb7fa1640be0 SHA-256: 79ff60e16c7fc15705afcb48109807e74cbacaf5ec7d17c7a468f4a48174eebf
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector. The document body, though heavily obfuscated, contains text related to a 'matrimony app' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous external PDF links further suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.club/wix?keyword=bharat+marathi+matrimony+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a13bc2_18c654c8fb4c4cd8ad6be4918018bc34.pdf
    • https://static.usrfiles.com/ugd/f17c08_ab5abc8c5ce145da97673240e49d5589.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6c540fb377f418ca626bf783993789f.pdf
    • https://static.usrfiles.com/ugd/4c1554_913f608e6ae047e99d7f68d00bd6c585.pdf
    • https://static.usrfiles.com/ugd/a3b54b_328f0d15dd864101b6f48b63eb04dd0e.pdf
    • https://static.usrfiles.com/ugd/1849a1_24f2c93397ce4aaa88a8cb895493b620.pdf
    • https://static.usrfiles.com/ugd/1d64af_0d47a75d6a7240b99373eea15f421de6.pdf
    • https://static.usrfiles.com/ugd/87b9a8_68ca87f8d39b449bbd850cecf8cd95f2.pdf
    • https://static.usrfiles.com/ugd/3e5db3_4166a9de6cc94b6b905b6662c8b041ba.pdf
    • https://static.usrfiles.com/ugd/cec570_3232df5caea8455cb77752408739786a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f0ef534d9c14e938ebf0f527d2bec38.pdf
    • https://static.usrfiles.com/ugd/68ec51_e9f78f1e5bed475d9538a1020ea09677.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/how_to_update_xbox_one_controller.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/31356909962.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/kerberos_network_authentication_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/63653735207.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_off00006623.bin
133b7ff8493749ea1ae28f8298110047639d9ec66e2f2023539c7c1beab19391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 5000 bytes
font_01_sfnt_off00007700.bin
f6f3003689b400a2c6b41bc7f4f2492ebcaa5e0c6e63e8fd32b85a9d79689e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7700 9920 bytes

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