PDF malware analysis — malicious · 7e94608b53759a1e

MALICIOUS

PDF

44.1 KB Created: 2020-09-01 08:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6c2f9476ed874f243986ca9e187e638e SHA-1: 6100ca0f92e34b8095ef5f5f8c1d436ed93f4389 SHA-256: 7e94608b53759a1e80b1bdef0fab6dfc3917a30cba42c2495462b6cf4451ce01

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, https://ttraff.ru/wix?keyword=suara+burung+nuri+kepala+hitam, is identified as a malicious redirector. The document's structure and the presence of this malicious URL suggest an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=suara+burung+nuri+kepala+hitam
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0461/7489/6281/files/dememinom.pdf
- https://cdn.shopify.com/s/files/1/0427/8226/1415/files/saxarutisixovogiv.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
- https://cdn.shopify.com/s/files/1/0431/4575/6833/files/apigee_tutorial_for_beginners.pdf
- https://cdn.shopify.com/s/files/1/0438/4459/9958/files/61057437892.pdf
- https://static.usrfiles.com/ugd/911c12_07ceb5f888134582a810553c7c83a282.pdf
- https://cdn.shopify.com/s/files/1/0431/1298/8821/files/72668185325.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
- https://static.usrfiles.com/ugd/ef7b09_003d466599f346b198c416895f69630d.pdf
- https://static.usrfiles.com/ugd/34e21e_f7ebc9ac1f794b688d3563f4b53bdcc9.pdf
- https://static.usrfiles.com/ugd/d1c05f_52ae607b240a4188bf752c40c21f5643.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_off00007115.bin` `81af280953f4a5e2bb6ef0bb132301ce4b25e08b584a5e92e53e6dc5360a1148`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7115	5360 bytes
`font_01_sfnt_off00008329.bin` `fc9095cda01615687af963934b292ed021d30c3e324d352f81818d9c74ba31fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8329	9588 bytes

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