Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0092665324d6a0…

MALICIOUS

PDF

40.2 KB Created: 2020-09-06 14:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8df46c071d3180aaa273bef1be894d55 SHA-1: 54527c07f5acea2d3bef5d138a8cc805a164eefe SHA-256: 4a0092665324d6a0b86d613e2f3265f3722c5ffb04a8b8a3cc67e19f7172a5cf
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, many pointing to Shopify domains, likely to manipulate search engine results or hide the primary malicious destination. The document body contains the text 'Chairs ki chaitwal song' and the malicious redirector URL, suggesting a lure to disguise the malicious nature of the document. The primary IOC is the malicious redirector URL.

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.link/wix?keyword=chairs+ki+chaitwal+song
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/gukifamidepamerelisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/89546830529.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/tixubosivurusowurozasi.pdf
    • https://cdn.shopify.com/s/files/1/0466/8630/6468/files/tegitimubowoxuru.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/neoliberalism_globalization_and_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/caulfield_cup_2020_form_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0335/files/template_wordpress_elementor.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/43249426175.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/buku_biologi_sma_kelas_11_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://static.usrfiles.com/ugd/c7a620_e164381b7d42448daa155821d9fcde89.pdf
    • https://static.usrfiles.com/ugd/9eb187_af91f541485b480193ccfb8d772949e5.pdf
    • https://static.usrfiles.com/ugd/10a4aa_73514187a32948f2a43ec32acd44faff.pdf
    • https://static.usrfiles.com/ugd/d61b30_aeb8bd2d91e84e2ebcfc1bb09b77d4f8.pdf
    • https://static.usrfiles.com/ugd/43d598_c12fc37627fc4c928a2bd3cfd4f9ae49.pdf
    • https://static.usrfiles.com/ugd/b85eb0_0e5fb18065f14c5dbe941586e0918805.pdf
    • https://static.usrfiles.com/ugd/e9cba9_67f5ac291124443d8046a124201a20ae.pdf
    • https://static.usrfiles.com/ugd/11baf9_9d9ccea9eb0f4e88801d8a32adbd50ed.pdf
    • https://static.usrfiles.com/ugd/d162e3_1380369d75714209a7e4a67d8bb418b8.pdf
    • https://static.usrfiles.com/ugd/cf14a4_a5fb4fd98a0d41088e24346763892139.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_off00005494.bin
530023ed4bd263941306d0c5f51056597bb9ceef855dcca1681347c452f1d47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5494 4912 bytes
font_01_sfnt_off00006547.bin
4fee754e04f8ba8c40ad9d62c505db8564e4305c4ef205bcf2927b5296f45a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 9480 bytes
font_02_sfnt_off000085bb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BB 4324 bytes

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