PDF malware analysis — malicious · 4b963bd88153e36e

MALICIOUS

PDF

56.2 KB Created: 2020-09-10 02:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b444cf37704c544b78a6260696eb7dd6 SHA-1: f82379fe5cdee53d19a3297d34bca3dd0183cde4 SHA-256: 4b963bd88153e36e723d2a0583a4bcf48cc8159a0a7c0771c4d958edf5852832

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a mass external PDF link farm, with the primary malicious URL being 'https://ttraff.club/wix?keyword=bear+grylls+modi+episode'. The document body contains garbled text but includes the same malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site disguised within a seemingly innocuous document.

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=bear+grylls+modi+episode
- https://cdn.shopify.com/s/files/1/0434/7651/7014/files/58174928015.pdf
- https://cdn.shopify.com/s/files/1/0448/1787/5110/files/ecological_modernisation_theory.pdf
- https://cdn.shopify.com/s/files/1/0431/0718/8898/files/naxivukelazaxidejote.pdf
- https://cdn.shopify.com/s/files/1/0435/0600/8216/files/57850469343.pdf
- https://cdn.shopify.com/s/files/1/0457/9200/2204/files/87257922289.pdf
- https://cdn.shopify.com/s/files/1/0436/1568/2717/files/strchr_in_c.pdf
- https://cdn.shopify.com/s/files/1/0430/0223/2983/files/58491325455.pdf
- https://cdn.shopify.com/s/files/1/0448/0948/6498/files/easy_classical_piano_sheet_music_free.pdf
- https://static.usrfiles.com/ugd/2ca22b_256b2b2262b74869b767a6a728baebad.pdf
- https://static.usrfiles.com/ugd/2eec94_97c2ef1bd34346809eec302214dd1059.pdf
- https://static.usrfiles.com/ugd/865d50_0f5298f3827447be9bdf0e1e2b229e47.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000062a1.bin` `e509770d0acf9e7d8a8847e089e41447f61d0280082e0c323a9619b49f17b9ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62A1	5428 bytes
`font_01_sfnt_off00007508.bin` `71d7bb4b6511513379c5607de530dd0d79073ea676f2b0aa38ee6ba67a72cae5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7508	7516 bytes
`font_02_sfnt_off00008a81.bin` `89bc1aafcc044733fc784a32bf4bd0946bcc9b1d587b91946a6b0e994ae656a1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A81	10852 bytes
`font_03_sfnt_off0000afad.bin` `1dba242e84c6124d85740d0b6487081d9636e0f08d626459a9710627d250f2e0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAFAD	17376 bytes
`font_04_sfnt_off0000c7e9.bin` `545ff9543bc6966e0b73ea750677ac750542e9fc1343b774329df209e15310fc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7E9	2824 bytes

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