PDF malware analysis — malicious · c68726943d0dcdc8

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 10:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a1a18e2c87ba66df6029a857427fb317 SHA-1: 5c6307112d61686ca7de49803b9377615128591a SHA-256: c68726943d0dcdc8bd98f012a9cc16cdd64ef454abbea04e7ebf36eaacb3e5f1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.com/wix?keyword=mixed+english+grammar+exercises+pdf is part of a known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to host numerous external links, likely to distribute malicious content or engage in phishing. 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.com/wix?keyword=mixed+english+grammar+exercises+pdf
- https://static.usrfiles.com/ugd/0c41e7_3448ee061feb4817bd17adeb19567b8e.pdf
- https://static.usrfiles.com/ugd/93c935_76663c0476a3490187a30e686bdd444e.pdf
- https://static.usrfiles.com/ugd/455f95_e47217763ace4fa294b80c59537feacf.pdf
- https://static.usrfiles.com/ugd/c3f88d_02701c6f0750421c94a57f08fac26cd6.pdf
- https://static.usrfiles.com/ugd/b8c837_7383c48d06cb41799bd6d22c2e475cff.pdf
- https://static.usrfiles.com/ugd/b8c837_d3970dcf940a419e8db6405f4b8fbe54.pdf
- https://static.usrfiles.com/ugd/432b07_6f6d7f9a42ed4c9a988139c64a609e72.pdf
- https://cdn.shopify.com/s/files/1/0438/3539/2150/files/halloween_word_search.pdf
- https://cdn.shopify.com/s/files/1/0434/8860/8418/files/create_bookmarks_in_adobe_reader.pdf
- https://cdn.shopify.com/s/files/1/0434/6318/0438/files/70074988976.pdf
- https://cdn.shopify.com/s/files/1/0431/0741/8273/files/cfop_tutorial.pdf
- https://static.usrfiles.com/ugd/5be868_c30afa8d741d45098525d6ca521eb26d.pdf
- https://static.usrfiles.com/ugd/e02969_a51d60e100d64e8085be34a68a02a9a4.pdf
- https://static.usrfiles.com/ugd/47b1e8_4cd354ebfa22458c990f9aa27d15660f.pdf
- https://static.usrfiles.com/ugd/516793_9d8b2a8799bb4ea99a41135c54660631.pdf
- https://static.usrfiles.com/ugd/1cfe37_47a816b88e3e4540a5e3655fd1d210d6.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_off00005fee.bin` `66b99527030e1e02fd6f530d9b9b9d5af3f1733aaeaa775bc4b617918b9c35fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FEE	5644 bytes
`font_01_sfnt_off000072f7.bin` `a58b91da129454c4d1c17773158458d58251f4762fc6742b419b0b0fc17996ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72F7	13932 bytes

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