Malicious PDF — malware analysis report

Static analysis result for SHA-256 8064f6e016f7cbe6…

MALICIOUS

PDF

36.7 KB Created: 2020-08-29 14:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be4bff27171fae6962473b2850908aad SHA-1: 7ce74a15eeabf966376b6bf1f64a042aafb678c0 SHA-256: 8064f6e016f7cbe627e4947482c31fa6dbdea09949540e5f2bbdbacf0fb87bd2
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm, indicating a deceptive purpose. The embedded URL, 'https://ttraff.club/wix?keyword=short+answer+study+guide+questions+to+kill+a+mockingbird+chapters+18-21', is the primary indicator of this malicious redirection. The ML classifier also strongly supported a malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=short+answer+study+guide+questions+to+kill+a+mockingbird+chapters+18-21
    • https://static.usrfiles.com/ugd/b8c837_7b12ea54676b4fd69226921cd694a7aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_beaa91321ad64ce6a6dc9611eb874beb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ca48d9cf1ea42d6b622902e88f03f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6b15135841943f7adcf568fb7d4e042.pdf
    • https://static.usrfiles.com/ugd/b8c837_9afb56d162f846aba42bc74130858379.pdf
    • https://cdn.shopify.com/s/files/1/0463/2782/4546/files/kemosokipuxoxilulon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/soturutugababijaxiwid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/becoming_supernatural_joe_dispenza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/nifazusogonuregalaxij.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab10d256cb7b4a27a94797658bcb401e.pdf
    • https://static.usrfiles.com/ugd/b7082a_ed39c5b960f34e1abd71cd201aec6fd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f4d.bin
0592a685b30ea1f013d8d55ecd38373111ddaf20c457f888a97d6503da72833a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4D 6524 bytes
font_01_sfnt_off00006563.bin
b7d9a8ec595342491c5b8c2fba7b071a0a90e1860fbd2492cbaf40c405eafdc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 9364 bytes

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