PDF malware analysis — malicious · e359585510a5c941

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 16:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: eef5e21248fdd7e6021062543eb570f7 SHA-1: bbf453d7412b1da4b07dbc1f090892cc58273e69 SHA-256: e359585510a5c94126a018d2ec559409f3d1a59b9dd342c085a81e0714f679c0

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, disguised as a template for an 'Elf on the Shelf' letter. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive document, directing users to a malicious URL for further compromise.

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.me/wix?keyword=elf+on+the+shelf+letter+template+pdf
- https://static.usrfiles.com/ugd/b8c837_21d6ff3c49214fa6ac49425e5d180274.pdf
- https://static.usrfiles.com/ugd/b8c837_33906e7b17164d1da9613f6d42afb0ce.pdf
- https://static.usrfiles.com/ugd/429b25_671b8f677b274b0592513c16ebe0642d.pdf
- https://static.usrfiles.com/ugd/cd79e3_47378f75f93c448eb8c8e563ef9f9497.pdf
- https://cdn.shopify.com/s/files/1/0436/2685/6610/files/55401701984.pdf
- https://cdn.shopify.com/s/files/1/0435/1596/9688/files/gozorigatajapefejuzoxuk.pdf
- https://cdn.shopify.com/s/files/1/0434/6901/3157/files/teoria_de_los_esquemas.pdf
- https://cdn.shopify.com/s/files/1/0437/2067/1386/files/87773543055.pdf
- https://cdn.shopify.com/s/files/1/0434/9699/7030/files/dreamgirls_full_movie_online_free_vi.pdf
- https://static.usrfiles.com/ugd/b8c837_c61a0aee4fac4d42a7e57be25f962646.pdf
- https://static.usrfiles.com/ugd/de65f7_539f0424fad9485a969b2d869dd027ce.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000065f5.bin` `e45d309cae5eab0c09a6c74a0fb6ae937393ebbc83afffc555306ec933545710`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65F5	5236 bytes
`font_01_sfnt_off00007795.bin` `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7795	1800 bytes
`font_02_sfnt_off00008023.bin` `d7b0f68f55d283c1e5a37da7cde4246506ed77004af25dd99350111093356aca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8023	10172 bytes

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