PDF malware analysis — malicious · 7f75c971e7d728de

MALICIOUS

PDF

47.6 KB Created: 2020-08-26 01:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e7b87150e5e86cf74b01c483bfb399c8 SHA-1: 4036c9683bc089abcce250fa904232302fe36fa8 SHA-256: 7f75c971e7d728de16691ef17791095607ac06957072bc41a86301e935daeb36

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=how+do+libras+act. It also exhibits characteristics of a PDF link farm, embedding numerous external links, some of which are to benign Shopify domains but others are suspicious. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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/pify?keyword=how+do+libras+act
- http://files.britttanya.com/uploads/1/3/1/4/131437834/2a96d7c0d4636.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0433/1916/5086/files/polid.pdf
- https://cdn.shopify.com/s/files/1/0433/4161/1159/files/wigebudaporikip.pdf
- https://cdn.shopify.com/s/files/1/0462/7736/1824/files/ap_calculus_derivatives_test_with_answers.pdf
- https://cdn.shopify.com/s/files/1/0439/3621/9291/files/ts_16949_standards.pdf
- https://cdn.shopify.com/s/files/1/0430/6678/5953/files/35311996255.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/cara_membuat_cv_dengan_format.pdf
- https://cdn.shopify.com/s/files/1/0439/3641/5899/files/19840011495.pdf
- https://cdn.shopify.com/s/files/1/0431/5843/8056/files/19746967784.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
- https://cdn.shopify.com/s/files/1/0437/1608/3877/files/scotsman_guide_logo.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_off00007cb1.bin` `920d9a21997c99cbb8028c1d69a03877c2c534ee18fbfe0b69cd9b059f311099`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CB1	5128 bytes
`font_01_sfnt_off00008e3a.bin` `a88db58e1fe45ef075c9712afae3811b431e9662303e02c9914e3a5a24fcb7b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E3A	10420 bytes

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