PDF malware analysis — malicious · 1b74470e1730194e

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 21:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ba6370d6bde645180bbf7ed754834f54 SHA-1: b38d2863fb2246de47db1238c682b5a6c8c4e607 SHA-256: 1b74470e1730194e7e3e8e0a898cf300cf40fddc1ced66bc226304ecdd82ef79

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=arteriovenous+malformation+brain+pathology+outlines. The document body contains obfuscated text and references to the URLs, suggesting an attempt to lure users into clicking these links. 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.ru/wix?keyword=arteriovenous+malformation+brain+pathology+outlines
- https://static.usrfiles.com/ugd/b8c837_a2df443e51294c52aa94d176184f0e2f.pdf
- https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
- https://static.usrfiles.com/ugd/12f4eb_89c7c6b4a93943e9998a99233fe505a1.pdf
- https://static.usrfiles.com/ugd/8acad3_fd90f6bbc72745069e870e4c27d6546d.pdf
- https://static.usrfiles.com/ugd/b8c837_1f629cc0bc584e1088d5d1d04d2847f5.pdf
- https://static.usrfiles.com/ugd/77eba6_60da60d6eb7f413d953a5185d6f6328b.pdf
- https://static.usrfiles.com/ugd/b8c837_de1982beb60f4633a0fc9de9b3d86fd8.pdf
- https://cdn.shopify.com/s/files/1/0428/6673/7311/files/87999674790.pdf
- https://cdn.shopify.com/s/files/1/0429/7395/4204/files/58537230292.pdf
- https://cdn.shopify.com/s/files/1/0432/0519/7985/files/fufetemulaloga.pdf
- https://cdn.shopify.com/s/files/1/0435/4614/9023/files/log_antilogarithm_table.pdf
- https://cdn.shopify.com/s/files/1/0429/5757/0207/files/81440294067.pdf
- https://cdn.shopify.com/s/files/1/0438/0796/5341/files/azolla_pinnata.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_off00006f88.bin` `b5cb1da8ea2386ad03e114a633a71d91d890654d337f8bf5f232066635f84e77`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F88	5340 bytes
`font_01_sfnt_off000081c3.bin` `b7423e5b28555acbbea8c2a9ffa8af48f6bc7a7d042db4de63f793b04bf36bf8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81C3	5608 bytes
`font_02_sfnt_off000094b3.bin` `5a7037d8c360e4762a03d87662b72fea852ea89ff1a361be42543283493a7787`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94B3	11156 bytes

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