PDF malware analysis — malicious · 834b9cc31d161045

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 07:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 00c31f68cb7e5fbdafb188c8bfdf3a57 SHA-1: 5588c027e1e880e5a186a178c78a5ddea9e222f2 SHA-256: 834b9cc31d1610454153372833c0ee0ffbc519ed73d5cec689980c4233dd48c8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=which+smartphone+has+the+best+camera'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with 'https://static.usrfiles.com/ugd/12f4eb_08f381e91d804048be665c5869b11ae6.pdf' being the first listed. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same query string as the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=which+smartphone+has+the+best+camera
- https://static.usrfiles.com/ugd/12f4eb_08f381e91d804048be665c5869b11ae6.pdf
- https://static.usrfiles.com/ugd/b8c837_d5dd5b56f6ec452c817aecb991107b83.pdf
- https://static.usrfiles.com/ugd/b8c837_84db9e038b76482c880203a6b52351f6.pdf
- https://static.usrfiles.com/ugd/b8c837_5d05a729c1dd4c169673ba417321a4ac.pdf
- https://static.usrfiles.com/ugd/1decf9_46b9a6445c7e4fb399762b30a30346e1.pdf
- https://static.usrfiles.com/ugd/e3c460_500a8f97fb1d4913a45cbdbc1ed0da37.pdf
- https://static.usrfiles.com/ugd/b8c837_932a3e4dac5f4f908cf08eeffd8b4eb4.pdf
- https://static.usrfiles.com/ugd/b8c837_15a4cccd73704f5798b33229dc70b888.pdf
- https://static.usrfiles.com/ugd/ce0e6d_5cff891ce7b649db84bcdfa655fb7304.pdf
- https://static.usrfiles.com/ugd/b8c837_53e8f6c744ad4c91b07e0a08e93016c5.pdf
- https://static.usrfiles.com/ugd/b8c837_74fe8e30dec540dbb350c48f8d9780eb.pdf
- https://static.usrfiles.com/ugd/b8c837_a48fdee1769d4996ab14cc2f69dff205.pdf
- https://static.usrfiles.com/ugd/b8c837_fde285ca2f0545b58b282b894a371ec7.pdf
- https://static.usrfiles.com/ugd/097bd5_bf204409f2fe42079a5ffdd3efea5b1f.pdf
- https://static.usrfiles.com/ugd/b8c837_ffee06910d8b4c089bd896cc3b6c75a7.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/
- https://static.usrfiles.com/ugd/b8c837_ffee06910

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000658c.bin` `dd1e8988424e57c7633cd95db4b2147637a6a111a0b04b19bd6e61f08f318054`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x658C	5296 bytes
`font_01_sfnt_off00007769.bin` `f0e2e7885ac84825381d37627b5c8f6d9cbc31c77830b5e2abb991305878b474`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7769	13092 bytes

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