PDF malware analysis — malicious · 2603dbf0dda30426

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 02:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: df9b4390a227ae701d5a65fe2619c0ad SHA-1: 61a83e92828d1ad0e5a899322366c82a7c47a8d3 SHA-256: 2603dbf0dda30426c17d3949b82aeb7009ab648d0d7a85626a8abaa491ef944a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a specific redirector URL, https://ttraff.link/wix?keyword=toro+greenkeeper+gk212-04+manual, which is flagged as malicious. The document body, though heavily obfuscated, appears to contain references to this URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=toro+greenkeeper+gk212-04+manual
- https://static.usrfiles.com/ugd/b8c837_82c4394a3f19487da9638d2a4cc288e7.pdf
- https://static.usrfiles.com/ugd/b8c837_23cbb0ad6bea40678c8891ef98565bb8.pdf
- https://static.usrfiles.com/ugd/cafc24_509ba4f56e8b4dd89cbc77a8baa5ccee.pdf
- https://static.usrfiles.com/ugd/dfb5f8_c961f9a46f82473aa38ce2958a50bbf7.pdf
- https://cdn.shopify.com/s/files/1/0431/5571/8298/files/gutalesujipetoloxup.pdf
- https://cdn.shopify.com/s/files/1/0427/7148/0742/files/ritunabesuvumodozuxax.pdf
- https://cdn.shopify.com/s/files/1/0434/5564/3813/files/72670731109.pdf
- https://static.usrfiles.com/ugd/b8c837_c29ae1bceaaa479c8e4ea670a18e14fb.pdf
- https://static.usrfiles.com/ugd/09273f_9d90cf74f1d74e85ac0594d14938ff10.pdf
- https://static.usrfiles.com/ugd/b8c837_02fcd7a8c76540ff8357d32089e30245.pdf
- https://static.usrfiles.com/ugd/8de238_93d84f1ea6c74cf88ca4722a26236a6f.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_off000046a3.bin` `6616d347c9b4a60528fb58a5ab8811d078f1e8bf04951db87fcfb7c5569d1d6f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x46A3	5172 bytes
`font_01_sfnt_off0000582e.bin` `80debcb50e272c3403b267dc2e8574758fe95c022b3ddcac73cc4b61517c29ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x582E	9740 bytes
`font_02_sfnt_off00007981.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7981	4324 bytes

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