PDF malware analysis — malicious · eed11534b2f6247c

MALICIOUS

PDF

56.2 KB Created: 2020-08-30 04:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aace66b3eab78e57fd404fcbac700804 SHA-1: 8598e6755f382e9b44e74462781ccfecefa8903a SHA-256: eed11534b2f6247cd46fe017e3e72b8680b3b26906bfa4067cfa4b715f208d1b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=equa%25C3%25A7%25C3%25B5es+diferenciais+parciais+uma+i'. This indicates an attempt to redirect the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a tactic to increase search engine visibility or distribute malicious content. No scripts were extracted, but the presence of a malicious URL and the link farm heuristic strongly suggest a phishing or redirection attack.

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.cc/wix?keyword=equa%25C3%25A7%25C3%25B5es+diferenciais+parciais+uma+i
- https://static.usrfiles.com/ugd/0f5b72_503b5431fc3147f5bb1e50b93e344afa.pdf
- https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdf
- https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
- https://static.usrfiles.com/ugd/4f270c_cb07f059bda040b0a1be9225cc9e0f6f.pdf
- https://static.usrfiles.com/ugd/9e41f0_a08d664fd0d54b859922bbe5e1bee2cd.pdf
- https://static.usrfiles.com/ugd/b8c837_a357a50928244d5bb6def5c10414f7e1.pdf
- https://static.usrfiles.com/ugd/b8c837_a8298549005b4d39998f7f2e7733af31.pdf
- https://static.usrfiles.com/ugd/06497e_a0bd36e26ada4b419fcfa9324a31f456.pdf
- https://cdn.shopify.com/s/files/1/0462/6622/0695/files/linkedin_recruiter_message_template.pdf
- https://cdn.shopify.com/s/files/1/0427/9762/9596/files/vibosoft_android_mobile_manager_for_mac.pdf
- https://cdn.shopify.com/s/files/1/0433/3463/1579/files/gutudovivow.pdf
- https://cdn.shopify.com/s/files/1/0434/7399/3890/files/is_destiny_1_still_alive.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/
- https://static.usrfiles.com/ugd/b8c837_a829

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007e94.bin` `801918f9e2d51eb316163d21660b7397ca11f93ac3b09b9365d5b56523bfe31f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E94	3224 bytes
`font_01_sfnt_off00008ab6.bin` `8e5ba99a66a98b53e6c231ab78058cf75af6b5da087ac97797c69e07f34b2ccd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AB6	5752 bytes
`font_02_sfnt_off00009da3.bin` `08b515f9e1ec831a67a440bf9ac7eb3aad03e020c9f4be132037f76b1b5502fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DA3	18660 bytes

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