PDF malware analysis — malicious · 96d08cc0b24cf5ad

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 22:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f143f1e45e006dd629d394b4b916a8b2 SHA-1: 9bdb3caa5358cf4bd92a47f4732bdc29ecb0afde SHA-256: 96d08cc0b24cf5adfd6579f8e42a65cdf5b04109bcc701fe986b98ef13ab121f

152 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 large number of embedded external links, indicative of SEO poisoning or a phishing lure. The primary malicious URL identified is https://ttraff.club/wix?keyword=livros+apicultura+pdf, which is linked to known malicious infrastructure. The document body contains garbled text but also includes the same malicious URL and several other PDF links, reinforcing the attack pattern.

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.club/wix?keyword=livros+apicultura+pdf
- https://static.usrfiles.com/ugd/b8c837_04040f7608d74a0495fb67801fd37b0b.pdf
- https://static.usrfiles.com/ugd/3fc21f_99a2e0a7dd034fe3ba583c4b84c23b32.pdf
- https://static.usrfiles.com/ugd/b8c837_d2e163d0ad8f4ade89c02e5fa1497de2.pdf
- https://static.usrfiles.com/ugd/362633_811a0348a4e448808c9546cf87694ad7.pdf
- https://static.usrfiles.com/ugd/6c98bc_ea85e430e5e04024b2de3648c7c31620.pdf
- https://static.usrfiles.com/ugd/c3548c_c8aca7517cc048cf975a611b8126c51d.pdf
- https://static.usrfiles.com/ugd/b8c837_126e144c5ecc440babe735d92e7e5aeb.pdf
- https://cdn.shopify.com/s/files/1/0431/8042/5370/files/ielts_score_sheet_example.pdf
- https://cdn.shopify.com/s/files/1/0431/9579/3571/files/88066709069.pdf
- https://cdn.shopify.com/s/files/1/0431/4929/5776/files/24617305364.pdf
- https://cdn.shopify.com/s/files/1/0433/9331/9068/files/name_a_worksheet_in_excel.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_off00005dce.bin` `846d17e059f3a5fe582cf8f08d51431ad9a6b5931600f6b70ce5a7e4ebadffec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DCE	5148 bytes
`font_01_sfnt_off00006f6a.bin` `2980709e0c3be64f0083050bf60ff6cc447b926dcfae825c179e1c1d5be5bda8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F6A	10456 bytes

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