PDF malware analysis — malicious · 296c4a66ba830b6f

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 15:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ea82e146c593962bad25ecfd9e896577 SHA-1: 5ce527a5299185b0ea3b4fd83ea68aa2a696829e SHA-256: 296c4a66ba830b6f2d0c205801162adc96a687b85ea66388cd47109063211562

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'best music player apps android 2018' and the malicious URL, suggesting a lure. The PDF also contains a link farm pointing to multiple Shopify-hosted PDFs, indicating a potential SEO poisoning or link distribution tactic. No scripts were extracted from this sample.

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=best+music+player+apps+android+2018
- http://files.louiselindley.com/uploads/1/3/1/8/131856772/6500702.pdf
- http://jadul.stjohnsdelhi.org/uploads/1/3/1/3/131383893/3980458.pdf
- http://files.djsfitnessevolution.com/uploads/1/3/1/4/131408209/sikiperezutigimexus.pdf
- https://cdn.shopify.com/s/files/1/0431/6450/0134/files/nevos.pdf
- https://cdn.shopify.com/s/files/1/0444/3645/5591/files/xifoveza.pdf
- https://cdn.shopify.com/s/files/1/0434/3994/7932/files/lipolo.pdf
- https://cdn.shopify.com/s/files/1/0437/6018/9594/files/apache_poi_documentation.pdf
- https://cdn.shopify.com/s/files/1/0431/3874/4476/files/71840576163.pdf
- https://cdn.shopify.com/s/files/1/0430/7009/5521/files/82843081106.pdf
- https://cdn.shopify.com/s/files/1/0429/9672/7961/files/blacksmithing_projects.pdf
- https://cdn.shopify.com/s/files/1/0430/4388/1114/files/34656306269.pdf
- https://cdn.shopify.com/s/files/1/0431/6535/2093/files/videga.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_off00005f4c.bin` `b1694af4397a78a177be0a36bb449bcc7f1b8492c900e3a2ece4241e0b8a7cd4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F4C	5888 bytes
`font_01_sfnt_off00007347.bin` `8f118667f65641316517644ede7b96b410a1ea97fe931cfe5ec74bc978bc1044`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7347	10284 bytes

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