PDF malware analysis — malicious · 540167fa1dde3952

MALICIOUS

PDF

35.1 KB Created: 2020-11-04 16:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 89959c5e94802e5b82e1a6698b311cd4 SHA-1: 989952eb04a222436edee194fa57d1eabb606f20 SHA-256: 540167fa1dde39528492bdf46dc7f7fcc197f633d8b12c25830e6d8d49750e72

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the primary links, 'https://ttraff.me/123?keyword=rainbow+aquamate+ii+parts', is flagged as a malicious redirector. The presence of numerous PDF links, including one hosted on weebly.com, strongly suggests a link farm attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/123?keyword=rainbow+aquamate+ii+parts
- https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/tatulijalevever.pdf
- https://cdn-cms.f-static.net/uploads/4379043/normal_5f9989f1702b8.pdf
- https://cdn-cms.f-static.net/uploads/4368750/normal_5f93ba41cd13c.pdf
- https://cdn-cms.f-static.net/uploads/4424405/normal_5fa2a7cbb29ec.pdf
- https://cdn-cms.f-static.net/uploads/4405654/normal_5f951ede4e2e1.pdf
- https://cdn-cms.f-static.net/uploads/4368223/normal_5f88db954100f.pdf
- https://cdn-cms.f-static.net/uploads/4366018/normal_5f93a6fe7fb30.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jofunoje/philippi_elementary_school_staff.pdf
- https://s3.amazonaws.com/tesasubawalozan/lagixodatizi.pdf
- https://s3.amazonaws.com/vutame/grammar_for_ielts_test.pdf
- https://s3.amazonaws.com/felasorarabipis/73453028482.pdf
- https://s3.amazonaws.com/mijedusovineti/pupopenosife.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_off00004936.bin` `20a5ce2dba6a2d7dd24e030aa5123cff0f088959c01a4db5b71910eff82a7cd2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4936	5300 bytes
`font_01_sfnt_off00005b39.bin` `c40f3fa6b2e27eb7bf7cc09c869e68e7974b233b67da13a94025a0d5d4f9da53`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B39	10848 bytes

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