PDF malware analysis — malicious · 4eb73da44410d892

MALICIOUS

PDF

51.5 KB Created: 2020-09-01 07:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b64a7450c8b0c1249ea9830b738e994e SHA-1: d2d68d8a275413504b0cebf54ca89d6ae6e36b24 SHA-256: 4eb73da44410d8923192feecacb3fa29654b1babd73098da3357d9fc51aef6c4

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.com/pify?keyword=neuroblastoma+tratamiento+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com, which is flagged as a benign domain. No scripts were extracted from this sample.

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/pify?keyword=neuroblastoma+tratamiento+pdf
- https://static.usrfiles.com/ugd/b8c837_1f3c953a33f848168f00aea00b7fdb5e.pdf
- https://static.usrfiles.com/ugd/b8c837_c4a1241efb154e09aea32844d3733e53.pdf
- https://static.usrfiles.com/ugd/b8c837_cc88f8d536d54c9793ab3acb6a5863a3.pdf
- https://static.usrfiles.com/ugd/b8c837_0d6a86e2133444898ebf639d16076bd2.pdf
- https://static.usrfiles.com/ugd/c1615c_fba96e5fc07248829c3f304d261b4822.pdf
- https://cdn.shopify.com/s/files/1/0430/4610/9345/files/visual_code_css_formatter.pdf
- https://cdn.shopify.com/s/files/1/0437/6828/3287/files/d_d_storm_king_s_thunder.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdf
- https://cdn.shopify.com/s/files/1/0429/1752/7715/files/20859482307.pdf
- https://static.usrfiles.com/ugd/b8c837_a0ce30be00e344cbada7ca0ea8cfc5bf.pdf
- https://static.usrfiles.com/ugd/b8c837_a41ee739c4c04b99ab9cfd73163e7638.pdf
- https://cdn.shopify.com/s/files/1/0434/1504/4245/files/kojudelubiwuzuguwi.pdf
- https://cdn.shopify.com/s/files/1/0435/2131/0875/files/31928511562.pdf
- https://cdn.shopify.com/s/files/1/0429/0897/5263/files/uk_bribery_act_deutsch.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_off00007b1b.bin` `f3d1a80fd987d48484b7e86fafb41370ccd46cc00d737891cbeab3db2555d4ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B1B	5180 bytes
`font_01_sfnt_off00008c9b.bin` `73dce3e04f78f2c6aea3c37c96496afd8b69188032bfe74780b27d2ade7b3eef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C9B	11348 bytes
`font_02_sfnt_off0000b19b.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB19B	4324 bytes

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