PDF malware analysis — malicious · 5d7f4775c2939085

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 23:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 57ec88b6c509e38e6de83d6d62e766cd SHA-1: 6ebe1dc021f5d2bc4d046d7f0cce104ea672b37b SHA-256: 5d7f4775c2939085fb3180275628796b10d87f21114b0887389655c09596eb8f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/wix?keyword=pronunciacion+de+la+cancion+viva+la, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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.com/wix?keyword=pronunciacion+de+la+cancion+viva+la
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/2b25b5_6043ad850e014b51a42037808b69d4dc.pdf
- https://static.usrfiles.com/ugd/b8c837_ec5cedd48e114c2493038d81e44ebfea.pdf
- https://static.usrfiles.com/ugd/b8c837_6e29c1580c904fb5afabe02370fb5898.pdf
- https://static.usrfiles.com/ugd/b8c837_2c9b3ba46b3143a5a3cb622ac9fb4cc7.pdf
- https://static.usrfiles.com/ugd/cac9e4_46924d24b6bc4acb89e940ffae9890a0.pdf
- https://static.usrfiles.com/ugd/b8c837_38d614b8dec34dcc881415fb9c583ce8.pdf
- https://static.usrfiles.com/ugd/52b593_5a94c0fc99f040a892ed0244c4af284e.pdf
- https://cdn.shopify.com/s/files/1/0428/7227/5103/files/watson_crick_wilkins_and_franklin_wo.pdf
- https://cdn.shopify.com/s/files/1/0431/9461/3924/files/42725056957.pdf
- https://cdn.shopify.com/s/files/1/0429/9476/1877/files/asset_management_business_plan.pdf
- https://cdn.shopify.com/s/files/1/0431/1416/8480/files/45621552957.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000609d.bin` `e177932afe4bf092665b404ebeebd9727bf99ef8f5acc965ac1dab218c0b631b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x609D	4816 bytes
`font_01_sfnt_off00007104.bin` `7b561fe5dc5a1b8de40f8c3d46a6fde6dbad401ee34c5dcb247bbee7da1fac75`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7104	13656 bytes

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