PDF malware analysis — malicious · debacf2674fe017e

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 11:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bd4704c879f592027e77be5126929713 SHA-1: 8f56751ad79bc8f9392732d2af79b402b616da8d SHA-256: debacf2674fe017eb50d35fcff0a0afb564462a9b126f4e393e50207102ed98f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised with a search query related to 'No man's sky frigate stats'. This lure is intended to trick the user into clicking the link, which leads to malicious infrastructure. The PDF also contains a large number of external links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for the malicious lure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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/wix?keyword=no+man%252527s+sky+frigate+stats
- https://static.usrfiles.com/ugd/b8c837_3209c11817454c42a95375fe3333f0bc.pdf
- https://static.usrfiles.com/ugd/5bb01c_d0f28356c49940689a384eb4f248d322.pdf
- https://static.usrfiles.com/ugd/b8c837_867dfd62903a4df59efb9f9b30a9b231.pdf
- https://static.usrfiles.com/ugd/b8c837_2d77b55810b44e66b0a011550b59a5db.pdf
- https://static.usrfiles.com/ugd/735424_d451e41cbadd4e16880262047e7f113c.pdf
- https://static.usrfiles.com/ugd/b8c837_b935ffb06d364bbbab26a4ffbc5f59e0.pdf
- https://static.usrfiles.com/ugd/9374a7_c849ae42aa5e432d825f9ed2d402e5c9.pdf
- https://static.usrfiles.com/ugd/6a7407_0bc927d2129a450ca7565f3b92e1629d.pdf
- https://static.usrfiles.com/ugd/b914b5_819b6405c89240ce9b77eb87fb030c7f.pdf
- https://static.usrfiles.com/ugd/b8c837_2194ea78d2544d08ad7d57aa5fd3d928.pdf
- https://cdn.shopify.com/s/files/1/0433/1202/1662/files/69827853130.pdf
- https://cdn.shopify.com/s/files/1/0443/3159/7980/files/92468222356.pdf
- https://cdn.shopify.com/s/files/1/0428/4612/6247/files/list_of_waterfalls_in_kerala.pdf
- https://cdn.shopify.com/s/files/1/0432/2977/3982/files/41673431010.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006334.bin` `faab6a1fb840d0d19a9a4119b8ec1bbe00bbe51adb7913262443d0ee99f21f72`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6334	5012 bytes
`font_01_sfnt_off00007432.bin` `79fe8ce68ebd77a38968581e6a5450dcdf69916df7b4d8b2ed65ef7e760570f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7432	9980 bytes
`font_02_sfnt_off00009611.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9611	4324 bytes

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