PDF malware analysis — malicious · 3bb8170613793fea

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 03:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c192143c507af7f3ac2e8dae536a2eac SHA-1: a13692b3e36e8cfdd451abe8f5cd51dabd90a0a8 SHA-256: 3bb8170613793feafbe9655edad60c38ed995290318c31c6145da2f07b2e4bc7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, and the document body contains numerous links to external PDF files, suggesting a tactic to manipulate search engine results or distribute further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/wix?keyword=wh+question+worksheets+for+preschool
- https://cdn.shopify.com/s/files/1/0440/5533/0981/files/biology_notes_class_10_cbse_life_processes.pdf
- https://cdn.shopify.com/s/files/1/0431/8671/6830/files/65299712915.pdf
- https://cdn.shopify.com/s/files/1/0436/0693/3661/files/android_tv_box_x96_mini_firmware.pdf
- https://static.usrfiles.com/ugd/b8c837_6284ee5ef7f74cc293fa6d99cbb42d45.pdf
- https://static.usrfiles.com/ugd/9c43ec_a1aa953081914818b16b0c6fe4adb722.pdf
- https://static.usrfiles.com/ugd/b91566_824de7ba359944c2b7bddaf307779b25.pdf
- https://static.usrfiles.com/ugd/a91264_521bfffb82854c2c8f4b571c59622320.pdf
- https://static.usrfiles.com/ugd/8cbfce_94259d072a1a4e1982cab98fe8c0e2c0.pdf
- https://static.usrfiles.com/ugd/cf14a4_89c1fd1971484ea9b850cbdd1fc81dfc.pdf
- https://static.usrfiles.com/ugd/b8c837_477aeae050044451953b60dacb484e92.pdf
- https://static.usrfiles.com/ugd/b8c837_90f3194e6bc64949924889cee6bf18be.pdf
- https://static.usrfiles.com/ugd/b8c837_ecbae893454846a49b35a5d79251e6c3.pdf
- https://cdn.shopify.com/s/files/1/0431/8229/3141/files/rijetudarudon.pdf
- https://cdn.shopify.com/s/files/1/0437/4229/8264/files/dead_by_daylight_doctor_build.pdf
- https://cdn.shopify.com/s/files/1/0436/8292/2646/files/vexezolebapimepigikaregad.pdf
- https://cdn.shopify.com/s/files/1/0430/5852/8405/files/sapalilelun.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_off00004a6c.bin` `07ecbd60115b7dc40c095a9dd57bc07b6047a70bf23aee23b91ee7e8c857ed58`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4A6C	5188 bytes
`font_01_sfnt_off00005c31.bin` `e6b5260964f89f8512be5c36de094c56f16690908f7acd7aa29a9a46e1800409`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C31	10924 bytes

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