PDF malware analysis — malicious · 46804d17b48d1306

MALICIOUS

PDF

47.5 KB Created: 2020-08-29 17:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c6e05064c2ed144fb75468410c966cc3 SHA-1: e95798786d9d21349fe8d95ac93fb70fe70f5c3f SHA-256: 46804d17b48d130619cc292c11a440b165a2e74350d881febf51e89dc4c2bad3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, likely to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=abirami+anthathi+lyrics+pdf+free+download
- https://static.usrfiles.com/ugd/b8c837_4ba776081e1a4b24b12f870d08ffc894.pdf
- https://static.usrfiles.com/ugd/15cd4d_5ffa86de00ff49b79ea8cef31234679f.pdf
- https://static.usrfiles.com/ugd/b8c837_1505b55887c0471ea6653e924c00a7b1.pdf
- https://cdn.shopify.com/s/files/1/0436/9825/8073/files/from_c_to_c_word_whizzle.pdf
- https://cdn.shopify.com/s/files/1/0435/0276/4184/files/98903461422.pdf
- https://static.usrfiles.com/ugd/b8c837_580575a57c014bba9314d1ad3098713d.pdf
- https://static.usrfiles.com/ugd/b8c837_93ba3da61f764956aa760ba5357b868c.pdf
- https://static.usrfiles.com/ugd/b8c837_2f587eeae5dd4c36b66325d0e668e7d3.pdf
- https://static.usrfiles.com/ugd/b8c837_cb9596d55daa406ca86ad6718f62e0b2.pdf
- https://static.usrfiles.com/ugd/b8c837_4f9d7878fc5d424aa2ad22b1841f14e4.pdf
- https://static.usrfiles.com/ugd/b8c837_bed65fcd91c445d79940ca66078fefe7.pdf
- https://static.usrfiles.com/ugd/510a18_98463653911a456eba358b314c159847.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007bc3.bin` `42c275ccec76ba080b6aa50beb148ed9de85a2554841634dca3ff7154ddb7ea5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BC3	5716 bytes
`font_01_sfnt_off00008f11.bin` `e858238e809063bbf668c7ea280ff6bdda2a8bb4d748273818a528a9dd1b97ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F11	10012 bytes

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