PDF malware analysis — malicious · f28886ae96cc3e08

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 02:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2b40621b4fe1928467c4ecb9d2043926 SHA-1: 3b6d5fc2e4ca1a3745b494352ecb02dd55724e23 SHA-256: f28886ae96cc3e08d06edc6ec2ccb2e0be47a1a53958dc118196cbf014c5ca80

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, which is designed to lure users to potentially harmful content. The document body, though heavily obfuscated, contains text referencing 'strategy games android top' and the malicious URL, suggesting a social engineering pretext. The presence of a large number of embedded links, many pointing to benign-looking PDFs, is characteristic of SEO poisoning or link farm techniques used to distribute malware.

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.club/wix?keyword=strategy+games+android+top
- https://static.usrfiles.com/ugd/39d081_75e18b0a6b244afe9b697f2941e6b708.pdf
- https://static.usrfiles.com/ugd/efb3f0_c90e1c48866c40c188200ed0153fd4e1.pdf
- https://static.usrfiles.com/ugd/735424_89e6134957c94f688c4bf13b3bbbe02c.pdf
- https://cdn.shopify.com/s/files/1/0428/6844/1254/files/lucerne_planting_guide.pdf
- https://static.usrfiles.com/ugd/b8c837_7642f6ffc28645288c5cd434533edc10.pdf
- https://static.usrfiles.com/ugd/516793_aeb381640dd241ab8156a7e6a8cabd4b.pdf
- https://static.usrfiles.com/ugd/b8c837_5914985513b54c4db41644b2db3b7418.pdf
- https://cdn.shopify.com/s/files/1/0448/5575/4914/files/acxion_fentermina_30mg.pdf
- https://cdn.shopify.com/s/files/1/0433/0684/4315/files/68018161177.pdf
- https://cdn.shopify.com/s/files/1/0434/4266/7676/files/intellij_format_code_whole_project.pdf
- https://cdn.shopify.com/s/files/1/0435/1921/3727/files/56233793502.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_off00006326.bin` `a07e166876e02dfb014ea00a52b4d11b5ffeb5aefc49de406414e1c548255d91`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6326	5452 bytes
`font_01_sfnt_off000075a7.bin` `633e164aafb081f93c7f783137cd310c8c725897201b7853689382018735cef1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75A7	10212 bytes

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