PDF malware analysis — malicious · e7ca1c22352a99cf

MALICIOUS

PDF

39.4 KB Created: 2020-09-01 05:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 08b53dd41abee9418de484542df4231e SHA-1: 98a8d5d9af0002b3ca2d1659c83413e2f2f03065 SHA-256: e7ca1c22352a99cfa72d18095d49ddd72d648c7e10722185773116ee43ff992e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=gmp+packaging+guidelines'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other links to Shopify-hosted PDFs indicates a potential link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=gmp+packaging+guidelines
- https://cdn.shopify.com/s/files/1/0438/6249/1286/files/62971307135.pdf
- https://cdn.shopify.com/s/files/1/0433/7103/6823/files/personal_shopper_app_android.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/beloromawodosuxaso.pdf
- https://cdn.shopify.com/s/files/1/0432/2508/8168/files/baixar_free_compressor.pdf
- https://cdn.shopify.com/s/files/1/0434/6360/6429/files/lodadagibonetud.pdf
- https://cdn.shopify.com/s/files/1/0432/4917/2643/files/71643063732.pdf
- https://cdn.shopify.com/s/files/1/0431/7410/1160/files/koxezulejuwekawiwunexoka.pdf
- https://cdn.shopify.com/s/files/1/0440/8151/2613/files/video_er_app_for_android_2019.pdf
- https://cdn.shopify.com/s/files/1/0431/9461/3924/files/39975830167.pdf
- https://cdn.shopify.com/s/files/1/0458/0707/5494/files/furediwenorebobe.pdf
- https://cdn.shopify.com/s/files/1/0429/8260/4963/files/xixoxid.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d78.bin` `21bd64a3cb2e390b52ac2ab7510c03244115b4e276b4d108b8a9b3f7adf92cb8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D78	5392 bytes
`font_01_sfnt_off00006fc5.bin` `a988dadc7bd9693a8c30b8693126343dcb67f4b2d66c959c0bb0539be2c0253d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FC5	9700 bytes

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