PDF malware analysis — malicious · b8d4643b5bed78ff

MALICIOUS

PDF

42.1 KB Created: 2020-09-05 18:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 00c6610d71dbe079fd2abff56836c6b2 SHA-1: a829c841a1819198f3e4d8404ee42d5457250f54 SHA-256: b8d4643b5bed78ff67791f9552c874b35bab9936f6538b1fda0ddedc572f7aa4

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.link/wix?keyword=bhrashtachar+par+nibandh+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to 'static.usrfiles.com', suggesting a large-scale SEO spam or phishing campaign.

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.link/wix?keyword=bhrashtachar+par+nibandh+pdf
- https://static.usrfiles.com/ugd/83b1b3_694f220142da46ad9ef16ae6ff143480.pdf
- https://static.usrfiles.com/ugd/b8c837_f0cd584adfd84226944bf179f5467e41.pdf
- https://static.usrfiles.com/ugd/145364_d4d474fe64fb41d997387df50a2c7ae2.pdf
- https://static.usrfiles.com/ugd/eb5a6a_a56c55d98aff44e89139c62e8091c681.pdf
- https://static.usrfiles.com/ugd/69695d_a8c75d9d6a9f433ebe2b9c9eb04c3baf.pdf
- https://static.usrfiles.com/ugd/e3ff21_8ad3fceba01b428ab7244012ae050ffb.pdf
- https://static.usrfiles.com/ugd/fb5067_eacb79e12eec402cb73dd9740771fe78.pdf
- https://static.usrfiles.com/ugd/70094d_cef4349fd2454dd2ac7acd5958c01592.pdf
- https://cdn.shopify.com/s/files/1/0430/5082/7929/files/15726040166.pdf
- https://cdn.shopify.com/s/files/1/0433/8044/1238/files/nypd_patrol_guide.pdf
- https://cdn.shopify.com/s/files/1/0459/6813/0208/files/92628771051.pdf
- https://cdn.shopify.com/s/files/1/0430/4296/3613/files/65963558704.pdf
- https://cdn.shopify.com/s/files/1/0429/1405/4300/files/cute_cat_images_free.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
- https://cdn.shopify.com/s/files/1/0439/6512/0670/files/comment_fusionner_fichier.pdf
- https://cdn.shopify.com/s/files/1/0434/1052/2268/files/83813487587.pdf
- https://cdn.shopify.com/s/files/1/0437/8204/5858/files/96815291949.pdf
- https://cdn.shopify.com/s/files/1/0431/1223/5159/files/6525392899.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_off0000681c.bin` `1d39dfefedf921f180349b891b96be58c9374284c7d753b5b1220960f2c77063`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x681C	5400 bytes
`font_01_sfnt_off00007a6a.bin` `c32a329cb87289beb92ff9f6edaec1addcfac88752cd8bf6b4b6824d5867bcb7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A6A	9712 bytes

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