PDF malware analysis — malicious · 190b59493797891a

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 00:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7f4e1a80575bc66c5da2f24761199840 SHA-1: 3077be87eb57552bb465b58b165779c4ef62efdb SHA-256: 190b59493797891a0b3922a80ec8ed01128cadf11169c1d28d6791f521606088

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a tactic to manipulate search engine results or to distribute malicious content under the guise of providing book-related PDFs. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector is a high-confidence indicator of malicious intent.

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=libros+de+john+katzenbach+pdf+la+historia+del+loco
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/6128/8868/files/zikizulapejadolabog.pdf
- https://cdn.shopify.com/s/files/1/0436/8682/2053/files/face_recognition_security_system.pdf
- https://cdn.shopify.com/s/files/1/0431/5054/0964/files/94793085326.pdf
- https://cdn.shopify.com/s/files/1/0429/7313/5011/files/zokapopax.pdf
- https://cdn.shopify.com/s/files/1/0429/4931/2665/files/pirotekedanik.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/42950808189.pdf
- https://cdn.shopify.com/s/files/1/0438/6878/2757/files/chemistry_scientific_notation_worksheet_answer_key.pdf
- https://cdn.shopify.com/s/files/1/0428/3708/2271/files/98936428762.pdf
- https://cdn.shopify.com/s/files/1/0432/0896/6306/files/1118550623.pdf
- https://cdn.shopify.com/s/files/1/0430/9087/0423/files/uk_citizenship_application_form.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_off00005a9e.bin` `f29d8b68f90b6dcf4429736ea5d115a0f0bded1dcec881612ff5c348e57b1d4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A9E	5512 bytes
`font_01_sfnt_off00006d5f.bin` `18cf239dfdcee51e3ec5e9ec7c9edfeaa1a7ef99a29e6564c7c1797dca377873`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D5F	10828 bytes

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