PDF malware analysis — malicious · c02d33c47be3294a

MALICIOUS

PDF

42.3 KB Created: 2020-09-04 23:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b68a81801a019351c659ce504bb11994 SHA-1: 615c4432215deef6224a470f469699042b3a9958 SHA-256: c02d33c47be3294a789d3f5e09f9fc19742e7a3c28ee84ad5736251e079adcd3

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a mass external link farm, with 30 links pointing to PDF files hosted on Shopify. One of these links, https://ttraff.me/wix?keyword=av+malformation+brain+stem, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=av+malformation+brain+stem
- https://cdn.shopify.com/s/files/1/0433/6153/4111/files/causes_of_depression_in_students.pdf
- https://cdn.shopify.com/s/files/1/0431/3782/6973/files/92942862838.pdf
- https://cdn.shopify.com/s/files/1/0465/9521/1429/files/91524364804.pdf
- https://cdn.shopify.com/s/files/1/0428/7637/1110/files/bbc_articles_for_ielts.pdf
- https://cdn.shopify.com/s/files/1/0431/8419/3696/files/29515503457.pdf
- https://cdn.shopify.com/s/files/1/0438/2159/6834/files/34075638935.pdf
- https://cdn.shopify.com/s/files/1/0437/6897/1418/files/98177214706.pdf
- https://cdn.shopify.com/s/files/1/0437/0078/1208/files/29204964532.pdf
- https://cdn.shopify.com/s/files/1/0432/1135/8372/files/jopiletewef.pdf
- https://cdn.shopify.com/s/files/1/0430/3601/6802/files/nesidedivovof.pdf
- https://cdn.shopify.com/s/files/1/0428/7276/6631/files/throwing_up_emoticons.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
- https://cdn.shopify.com/s/files/1/0438/6196/7013/files/78599448497.pdf
- https://static.usrfiles.com/ugd/46429b_86f99c1ff0ce4df19eb44c8005a4ce34.pdf
- https://static.usrfiles.com/ugd/f64db8_61840ea9def74f7fb620b419a1df6318.pdf
- https://static.usrfiles.com/ugd/df4650_327c81ad6cc64cd8becd1f8e36c88958.pdf
- https://static.usrfiles.com/ugd/b8c837_d3eeb3ced771494d89cdb5f217548af8.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_off000067d4.bin` `8cfcfb5dffb11b7cf0471dfa2c2dd317f8bf62a29bc85b7e9e91fc9c82bf3f6b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67D4	5104 bytes
`font_01_sfnt_off0000791d.bin` `039c1c4d2d51fa7f140bde43325722ca4cd42664e89697d66ed204f0c8f80baa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x791D	10296 bytes

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