PDF malware analysis — malicious · 4bc77ac3398b21eb

MALICIOUS

PDF

49.5 KB Created: 2020-09-01 11:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: be96fd7b77d3faf7ebe033d162ae92e0 SHA-1: a025f27846a4b111686a4f3dd1ab339c19dcd119 SHA-256: 4bc77ac3398b21ebb80d15a5b45e5339a3750a9140e280a7611ef2789682dffa

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bootstrap+table+data+template, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=bootstrap+table+data+template
- https://static.usrfiles.com/ugd/90423f_a0662861780647c98b0e04fc405ed0ce.pdf
- https://static.usrfiles.com/ugd/71fd01_9b8a5ba175684c20b0e8cd133b4b5bc8.pdf
- https://static.usrfiles.com/ugd/e4ff69_24a1afc2413946beacffa57f88696b98.pdf
- https://static.usrfiles.com/ugd/8a419d_2c62ba87f146408381292800696d870d.pdf
- https://static.usrfiles.com/ugd/77d535_79815e130b0d4e2aab7387e19fdc8f77.pdf
- https://static.usrfiles.com/ugd/19ce5d_bfafcefbc1284951a94ca7920f5eb1ba.pdf
- https://static.usrfiles.com/ugd/538d67_af7ee5c31b564375ad3e899e376deaaf.pdf
- https://static.usrfiles.com/ugd/5a1791_ea2125160913405a979460690dc3a72f.pdf
- https://static.usrfiles.com/ugd/b8c837_0fe6ca848f8b444f8be2538d1539486f.pdf
- https://static.usrfiles.com/ugd/82e28d_28d94bf8996e4fd99644ac8391821ef7.pdf
- https://cdn.shopify.com/s/files/1/0432/7355/2040/files/kissing_booth_book_online_free.pdf
- https://cdn.shopify.com/s/files/1/0432/3999/7595/files/66011251155.pdf
- https://cdn.shopify.com/s/files/1/0433/4842/6910/files/37903255909.pdf
- https://cdn.shopify.com/s/files/1/0432/1568/3743/files/fssai_answer_key_2019.pdf
- https://cdn.shopify.com/s/files/1/0452/2138/0247/files/39321282230.pdf
- https://cdn.shopify.com/s/files/1/0433/7061/0851/files/neo_bomberman_game_free_for_pc.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_off00008661.bin` `30ffcce33787f88ccf25b9472811d6368482eb70d176e6c14a1b0da8faa4eb68`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8661	5296 bytes
`font_01_sfnt_off00009840.bin` `5f7fdc4d020f77d7a7b5c786cc9e2ae44624a52039e82c68b1bf02e0568ec7c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9840	9712 bytes

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