PDF malware analysis — malicious · 4181ba150ba04a88

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 06:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a4f0131c7bea8a2547efcb594be0791a SHA-1: aa11b52a66526cb452a30ee7f3410241f8f0d9ce SHA-256: 4181ba150ba04a886a29316fe938aefb2ebbedb8e7c051d59bd56c3682f93b88

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 document body contains the URL https://ttraff.com/wix?keyword=modelo+de+lasswell+ejemplos, which is identified as a malicious redirector. The file also contains numerous links to static.usrfiles.com, forming a link farm.

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=modelo+de+lasswell+ejemplos
- https://static.usrfiles.com/ugd/b8c837_f48536f7208c499baacd5fd2431ace0c.pdf
- https://static.usrfiles.com/ugd/4b874d_6b0abcd464194d10a9f405e6ae12220c.pdf
- https://static.usrfiles.com/ugd/bdeb4c_0861e581b75543ada5212c6d1809d1d4.pdf
- https://static.usrfiles.com/ugd/eaf48f_4944a5a4b89c44a2b5de8aceb79c6b9f.pdf
- https://static.usrfiles.com/ugd/74e905_a498ea7dd3274432aeee408daa4cc81a.pdf
- https://static.usrfiles.com/ugd/b8c837_3e75b790cbea4b9398d784f0834df93e.pdf
- https://static.usrfiles.com/ugd/eb4c03_dd15c4e102aa4fdc88f03f574d4bff6d.pdf
- https://static.usrfiles.com/ugd/b8c837_72a8694667944921a2d1341581369d6a.pdf
- https://cdn.shopify.com/s/files/1/0437/1978/6645/files/30326559336.pdf
- https://cdn.shopify.com/s/files/1/0438/3778/4224/files/gm_service_manual.pdf
- https://cdn.shopify.com/s/files/1/0434/9437/5576/files/tifipufir.pdf
- https://cdn.shopify.com/s/files/1/0431/5630/8123/files/calcium_phosphate_carbonate_form.pdf
- https://cdn.shopify.com/s/files/1/0429/4213/6476/files/hssc_advt_11_2020_notification.pdf
- https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
- https://static.usrfiles.com/ugd/a107db_e0a43bcf826044c3a4c4f15e5d67b345.pdf
- https://static.usrfiles.com/ugd/704566_171e4973acda41839af2701ac724c67e.pdf
- https://static.usrfiles.com/ugd/930050_a999739216d84051bd6be857d5f4ccfc.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_off00006ab6.bin` `65dbd364ec20d5cb355706ee03fe7b1a88ee6181b60ffb7b1e551f454bea9409`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AB6	5184 bytes
`font_01_sfnt_off00007c63.bin` `a952372ba585db30635b038ec3a7832c7961fe4eac7446977ba5b6d6b08d16e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C63	10992 bytes

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