PDF malware analysis — malicious · 8f91d822902fa4bd

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 04:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a57dd6710d385bec20dd528a78246f81 SHA-1: 2fa051826a66f347aa06e7a30a86fcfebc13ece9 SHA-256: 8f91d822902fa4bddf9c03e0f1e0f03e89bb0938efb5c95514d2d0f40a8e09a7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a mass of external PDF links hosted on Shopify, with the primary redirector URL being https://ttraff.com/wix?keyword=casper+2+movie. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the identified URLs, suggesting a lure to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=casper+2+movie
- https://cdn.shopify.com/s/files/1/0430/8857/6665/files/38426851557.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
- https://cdn.shopify.com/s/files/1/0431/3550/0439/files/dexamifezagugafokozawivap.pdf
- https://cdn.shopify.com/s/files/1/0428/8629/9815/files/67601752249.pdf
- https://cdn.shopify.com/s/files/1/0431/9412/2400/files/badshah_telugu_video_songs.pdf
- https://cdn.shopify.com/s/files/1/0432/2567/7982/files/iegeek_security_wifi_outdoor_camera_1080p_manual.pdf
- https://cdn.shopify.com/s/files/1/0432/2548/1379/files/ac4_trke_yama.pdf
- https://cdn.shopify.com/s/files/1/0433/8457/0019/files/mizazowazavebikukunazup.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
- https://cdn.shopify.com/s/files/1/0440/1384/6686/files/design_system_template_adobe_xd.pdf
- https://cdn.shopify.com/s/files/1/0436/4258/5241/files/rosejen.pdf
- https://cdn.shopify.com/s/files/1/0434/7723/7913/files/61250719244.pdf
- https://static.usrfiles.com/ugd/2ca09c_5978e04cb6bd4087a64d4e4e49d9e22c.pdf
- https://static.usrfiles.com/ugd/837d34_e8f21872b9844685a947ef7f536568db.pdf
- https://static.usrfiles.com/ugd/3ceeb9_668948e34078439aa50700b009e7d063.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_off00006427.bin` `d8b890debdef19c8530d7e00939b83ead8d3da66f3a48bc0a6ec165caa05fed7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6427	5032 bytes
`font_01_sfnt_off0000752f.bin` `d1ca8560d3c210ed91683b18f65321bceb0fa3938a16095bff58c877b0809a99`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x752F	10896 bytes

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