PDF malware analysis — malicious · e9ba86b7b46701f6

MALICIOUS

PDF

32.1 KB Created: 2020-11-02 19:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a43ae02d5cd354dfb96c66c5322d088d SHA-1: d666228e615db60913fcaca087fa63f05c33d24d SHA-256: e9ba86b7b46701f60ecf8436851fb7e7a2fec48c98ff94fda75d7c77c860f0b7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.me/123?keyword=jbl+flip+3+instruction+manual`. This URL is embedded within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many pointing to S3 buckets, indicates a link farm SEO tactic. The ML classifier strongly supports the malicious verdict.

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=jbl+flip+3+instruction+manual
- https://cdn-cms.f-static.net/uploads/4368996/normal_5f90d8ae86a85.pdf
- https://cdn-cms.f-static.net/uploads/4370989/normal_5f8c0da0362d8.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/henghuili-files/8700253766.pdf
- https://s3.amazonaws.com/fazujo/59513763906.pdf
- https://s3.amazonaws.com/jubiferekaka/xugidowawenobuzupabipix.pdf
- https://cdn.shopify.com/s/files/1/0504/1461/6752/files/78338333245.pdf
- https://s3.amazonaws.com/vuzufexarevima/assessment_for_learning_book_in_tamil.pdf
- https://s3.amazonaws.com/sowewazulejewi/91227347229.pdf
- https://s3.amazonaws.com/jadudusujuje/zejawekizezagazosokidel.pdf
- https://cdn.shopify.com/s/files/1/0502/7073/2456/files/powuvibobotixelimav.pdf
- https://cdn.shopify.com/s/files/1/0495/5091/7784/files/history_of_fermented_foods.pdf
- https://s3.amazonaws.com/rizezobabub/toys_r_us_charity_requests.pdf
- https://s3.amazonaws.com/wonoti/51929662918.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_off000040d3.bin` `b2a53f90e3552c75fdbf6df17d7c11d2f0958becf51aa1203c2e52e6cb046c72`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x40D3	5456 bytes
`font_01_sfnt_off00005345.bin` `e3451c83b11b9827179b27e5b2d8638706d18fbaa0497984fb6e789d22a21629`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5345	9576 bytes

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