PDF malware analysis — malicious · 807c1adcc31ccb67

MALICIOUS

PDF

41.3 KB Created: 2020-09-07 11:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2359272b0c68628b8b33c892e51db042 SHA-1: fef6b20cb032909d7fa34ae2fbe21a41b8493342 SHA-256: 807c1adcc31ccb6771596f8c45fd86320d989af694167b2a5b25fd2ecb9d6105

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to benign Shopify-hosted PDFs, but one link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text and a URL, suggesting it is designed to lure users to malicious infrastructure.

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.me/wix?keyword=bay+fishing+guides+in+rockport+texas
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/2171/4079/files/manualidades_de_papel_para_nios_de_kinder.pdf
- https://cdn.shopify.com/s/files/1/0431/6764/5852/files/92304375099.pdf
- https://cdn.shopify.com/s/files/1/0431/5381/7749/files/87357255346.pdf
- https://cdn.shopify.com/s/files/1/0435/4247/9000/files/xoxez.pdf
- https://static.usrfiles.com/ugd/ca300b_c5a549e60d834e99b2993a895dfd9b02.pdf
- https://cdn.shopify.com/s/files/1/0435/5627/4339/files/hyundai_wiring_diagrams_free.pdf
- https://cdn.shopify.com/s/files/1/0429/9961/1553/files/gemeparuxogaxurudul.pdf
- https://cdn.shopify.com/s/files/1/0439/3032/1051/files/bakinufimupixijovogijob.pdf
- https://static.usrfiles.com/ugd/87fdc7_b061e3d28a1e4ac9b3974ab0c40706e3.pdf
- https://static.usrfiles.com/ugd/cece23_f0e372ac947e4d67bff9820a0ea768c0.pdf
- https://static.usrfiles.com/ugd/6846fe_316ab79919364319ab54516186f3938a.pdf
- https://static.usrfiles.com/ugd/bba345_419984c7e8eb45e09d693bd5c500ca9f.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_off00006165.bin` `0222a6072f94a805ee5921eece56ce4286c23abcb6b3b1c56994d033ca9d369c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6165	5668 bytes
`font_01_sfnt_off000074c4.bin` `db804fde072b14b0bf75cbec3a8a9e3b1422556b8283f35e3f13b4d1ded7ed64`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74C4	10568 bytes

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