PDF malware analysis — malicious · 631736413c4f003b

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 07:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e9db14a3ce669c01bb06aa65754b3916 SHA-1: 347e3e95d5873e5d1c5d8a14e412fc23e49cac66 SHA-256: 631736413c4f003b7b6004892aaa511593ed6089cb7b8941713a7882065825e6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'Asgore sheet music trombone'. The presence of numerous Shopify links suggests a link farm, potentially to obscure the malicious redirector. The ML classifier strongly indicates 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.com/pify?keyword=asgore+sheet+music+trombone
- http://files.roaminggoatmi.com/uploads/1/3/1/4/131453213/renigu.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0440/8157/8136/files/90642628425.pdf
- https://cdn.shopify.com/s/files/1/0435/3903/8359/files/bomujumotetofuz.pdf
- https://cdn.shopify.com/s/files/1/0432/4396/2532/files/81086949178.pdf
- https://cdn.shopify.com/s/files/1/0429/0124/2022/files/19954077078.pdf
- https://cdn.shopify.com/s/files/1/0433/4849/2438/files/3543305215.pdf
- https://cdn.shopify.com/s/files/1/0437/7765/4935/files/berliner_platz_neu.pdf
- https://cdn.shopify.com/s/files/1/0429/1392/3228/files/pawom.pdf
- https://cdn.shopify.com/s/files/1/0433/3905/5258/files/air_brake_system_project_report.pdf
- https://cdn.shopify.com/s/files/1/0439/4575/4792/files/rotuxofugejozojamogano.pdf
- https://cdn.shopify.com/s/files/1/0435/7835/9967/files/glencoe_french_1_bienvenue.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_off00005064.bin` `b52d5e46c8bae1053a581e8e240fb32bf12ddcdb893d630e938e88b3b74692d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5064	5100 bytes
`font_01_sfnt_off0000619e.bin` `b95a5c24fbdc9f63f886e70780bf5e1c131ab69110738b196fe8840a792f8daa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x619E	14948 bytes

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