Malicious PDF — malware analysis report

Static analysis result for SHA-256 154ec033ac186c0c…

MALICIOUS

PDF

38.9 KB Created: 2020-09-07 21:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2427aaed49359717a6047db3094ead SHA-1: b9874c9ee2bb13139a72b4da997e73252c665099 SHA-256: 154ec033ac186c0cf2ccd461d317ca1af888c3853bd22143b8bbf588473c4c2c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=kaththi+theme.+the+sword+of+destiny'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user through these links, potentially to a malicious site or to download further malware.

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=kaththi+theme.+the+sword+of+destiny
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/42797149482.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/vavamiwabozisanezadigan.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/25608879314.pdf
    • https://static.usrfiles.com/ugd/3fc21f_d8ab78147c5843eaa463a7d60ad3d275.pdf
    • https://static.usrfiles.com/ugd/9c8fb9_eb01913cf68e419f8d6c97e7514c091e.pdf
    • https://static.usrfiles.com/ugd/5b5da7_e97e2d4d40df4cf5944525a80c0c46eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5c6e364a7c6432a8407218a8b7165ab.pdf
    • https://static.usrfiles.com/ugd/4b7290_0b1b7ce7b4ab4e6b8f28a2ae9bb9af92.pdf
    • https://static.usrfiles.com/ugd/594ae5_822901e37744422da52b509cda357aaf.pdf
    • https://static.usrfiles.com/ugd/74a852_1a33268966bf45d2b970b3b5ef9a7d9f.pdf
    • https://static.usrfiles.com/ugd/eda9ba_c16139291cd944749413a1a169c76912.pdf
    • https://static.usrfiles.com/ugd/4bb103_d17e7d6d728742a6b4c4574cbbf73e4b.pdf
    • https://static.usrfiles.com/ugd/5b5da7_7ba1f135bf374c67ac4f8aad62cf1be2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046eb.bin
11efb596b21f5e086bf1c644602bdbfe1df142fa9b9c75339fa3d9f33c3bd477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46EB 5312 bytes
font_01_sfnt_off000058ec.bin
6712897ff68788f800f935911cb3da06c2535ad5b87e32da67f98259b2958840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EC 5868 bytes
font_02_sfnt_off00006b8d.bin
5f277971de76525c50e43a060f3bc48cc862d62d8aa72b944c70498fe7ff3edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 10180 bytes

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