PDF malware analysis — malicious · a776ba278b83e33c

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 20:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9aa86a8ade99c34641e7dbea60c1cf63 SHA-1: 875d3d4b129e9128461fdfb5c49b66e5b4da6e5e SHA-256: a776ba278b83e33cff3ddd65b2839de5f6c32ff2bdce4f086737fcffbc5f1d9c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify and static.usrfiles.com domains, which is indicative of a link farm. One of the primary links directs to a known malicious redirector, ttraff.me. This suggests the document is designed to lure users to malicious sites or to manipulate search engine results. No scripts were extracted from this sample.

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=davinci+kalani+crib+instructions
- https://cdn.shopify.com/s/files/1/0432/0247/8237/files/vudomijoxugewonaz.pdf
- https://cdn.shopify.com/s/files/1/0429/9181/2771/files/fifewu.pdf
- https://cdn.shopify.com/s/files/1/0433/6022/3382/files/cambridge_essential_english_dictionary.pdf
- https://cdn.shopify.com/s/files/1/0435/4211/8555/files/new_pattern_physics_for_jee_advanced_cengage.pdf
- https://static.usrfiles.com/ugd/33ab24_dbe6d3b70b054be7b700d7f383c8390c.pdf
- https://static.usrfiles.com/ugd/b8c837_d7d526a8d92843e3980dc44cb9cb89af.pdf
- https://static.usrfiles.com/ugd/756799_631c61635ab744b5ae6cdfe05e480e21.pdf
- https://static.usrfiles.com/ugd/2813e2_2e42f3ddd6174769ab09738adba6d8ec.pdf
- https://static.usrfiles.com/ugd/78c764_882f1634e80a4439bf3ca8150300c233.pdf
- https://static.usrfiles.com/ugd/b8c837_428b077b14644b6ab0bd1aaf80daee26.pdf
- https://static.usrfiles.com/ugd/b8c837_5a73af7e2b0f4ecca4c2399887728be6.pdf
- https://static.usrfiles.com/ugd/b8c837_9800b51d04f245bdb5d3dc1c43cfac2a.pdf
- https://static.usrfiles.com/ugd/724bd4_390a3f3224ea458e84cf3ed6e38a4acf.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005bb1.bin` `81e949cc97716b91281896bf249cb3b5c3a47ee882f719fe3a96e7980148f6e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BB1	5056 bytes
`font_01_sfnt_off00006cef.bin` `148d3eba6367bbe39c88df0db6448c1f34507451160b21c08152070ec19c79e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CEF	10180 bytes
`font_02_sfnt_off00008ff3.bin` `de55c6fde3da0ba71bfbb21e78eff058591ee91d9891cabf473f23fc218af4a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FF3	17624 bytes

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