PDF malware analysis — malicious · c6ea4cdd60e6fd62

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 05:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6782b64e546ac06bf4678c3a5ccd03f SHA-1: 4e484a7b1b0b5828f79163bc6dd9c26acb839bd6 SHA-256: c6ea4cdd60e6fd62e04fc881fa93bbf3ad8db8d98867987bdcfe006c4330a746

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector, suggesting a phishing or credential harvesting attempt.

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=sch%25C3%25A9ma+meiose+2n%253D+6
- https://static.usrfiles.com/ugd/24853a_306f5958155a45c0a24fa208bb92d180.pdf
- https://static.usrfiles.com/ugd/b8c837_a84918c81c784b88a640d33f38f09a31.pdf
- https://static.usrfiles.com/ugd/576447_ff0cc814c72c44eb804fc6a1017eb543.pdf
- https://cdn.shopify.com/s/files/1/0436/2531/6514/files/melioidosis_guideline.pdf
- https://cdn.shopify.com/s/files/1/0447/8251/8421/files/has_been_has_gone_exercises.pdf
- https://cdn.shopify.com/s/files/1/0432/9275/4076/files/clipsal_product_catalogue.pdf
- https://cdn.shopify.com/s/files/1/0440/2338/2166/files/sovosazuzutememafoj.pdf
- https://cdn.shopify.com/s/files/1/0440/8472/3864/files/formulaire_acompte_provisionnel_tunisie.pdf
- https://static.usrfiles.com/ugd/7baf93_954781910ce84d10bbaf81da30204f47.pdf
- https://static.usrfiles.com/ugd/c63dba_82d65d97a0e34c8a900886a9df96fe36.pdf
- https://cdn.shopify.com/s/files/1/0432/9072/2469/files/21417170395.pdf
- https://cdn.shopify.com/s/files/1/0434/8264/4642/files/xipivor.pdf
- https://cdn.shopify.com/s/files/1/0438/0868/6237/files/sexavekolutaxinudebadoter.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/
- https://cdn.shopify.com/s/files/1/0438/0868/6237/files/sexavekolutaxi

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b66.bin` `25332df7dd0bc7ace1e0803d6aa5d2511cba5a059be2deaffdd8ecd21bb46d97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B66	5488 bytes
`font_01_sfnt_off00006daf.bin` `0866c10e44407ec2636bdcb94f3f62d1d11177ad357967b6c542ed3e23c04172`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DAF	12012 bytes

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