PDF malware analysis — malicious · d63722007a4f1150

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 20:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fb8bd91f2fe037db921b8ecfabbd6d4e SHA-1: 31a8c5e7f03d637236a477f24030dd5f91c0aa9e SHA-256: d63722007a4f1150a262a00f01ff04cdff978c2e5c234d4bba94a59a604f80e6

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a significant number of embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The presence of a large link farm, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests a coordinated effort to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and link distribution are highly indicative of a phishing or scam campaign.

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.ru/wix?keyword=fundamentals+of+biochemistry+3rd+edition
- https://static.usrfiles.com/ugd/b8c837_984aba8673e94f28b01643f7eb643778.pdf
- https://static.usrfiles.com/ugd/5de1df_fcf6a463b5d14f59b62dd708a9dc23ce.pdf
- https://static.usrfiles.com/ugd/b8c837_aa221773c22547fdb89987f057ae7911.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/sunezefer.pdf
- https://static.usrfiles.com/ugd/c345b0_507d65a88a84401fb9814af1dacb0d68.pdf
- https://static.usrfiles.com/ugd/0049ca_3fe620472bcd4937a8bb5c13a057fe46.pdf
- https://static.usrfiles.com/ugd/b8c837_61bd09aa55164e8187b767f01e3b8b5b.pdf
- https://static.usrfiles.com/ugd/6116da_3274642ded064c67b2e939dfb9e98f57.pdf
- https://static.usrfiles.com/ugd/b8c837_fb0899de63194060909ada918b713a7c.pdf
- https://static.usrfiles.com/ugd/b8c837_f869c9e6f1204f20bb41cb2ded25ac0e.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_off000068dd.bin` `60bda5d59f24c8fa2233eb059805fa0a32ee9041bdcbd11821aa08489a817046`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68DD	5624 bytes
`font_01_sfnt_off00007bd5.bin` `6a6ab1c05b38b348a48735fe3febf8507a44b40e0e4bfeafb8344de43464944d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BD5	15168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.