PDF malware analysis — malicious · 902c4bacdd950f7d

MALICIOUS

PDF

41.9 KB Created: 2020-09-02 04:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4f7b0d9ecb3c08869bf286d28b7c7f3b SHA-1: e27a01197e68df569df5f6993e2fdecbd42aa178 SHA-256: 902c4bacdd950f7d9d042f9b7c3c3175b327c48ec6c8fcdded8af31b0049bcd7

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing numerous external links. One prominent link, 'https://ttraff.club/wix?keyword=brain+teasers+logic+with+answers', is flagged as malicious, suggesting a redirection to a harmful site. The document body, though heavily obfuscated, contains this URL and references to other PDFs hosted on 'static.usrfiles.com', which are part of the link farm. The primary attack pattern appears to be luring users to malicious content through a dense network of links.

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.club/wix?keyword=brain+teasers+logic+with+answers
- https://static.usrfiles.com/ugd/96768c_984e039633a94c9191e91aba0b80655a.pdf
- https://static.usrfiles.com/ugd/8da65f_326681cbaa1d46a68969e5c34f1bc805.pdf
- https://static.usrfiles.com/ugd/efb3f0_f4459abd88f3480a815956b86421ca74.pdf
- https://static.usrfiles.com/ugd/9ec29b_88e06a5100c3482088caa3447014a795.pdf
- https://static.usrfiles.com/ugd/33a16d_f28ad50bc91e42aa8013952da9b7c417.pdf
- https://static.usrfiles.com/ugd/b4609a_5a0efced87cc4a00a7fc1a7ee0fb1eb1.pdf
- https://static.usrfiles.com/ugd/c3f88d_afa93804888649db911c2726cb73bd23.pdf
- https://static.usrfiles.com/ugd/37428b_c93d7175ca8740c69a9bf0766807e0be.pdf
- https://static.usrfiles.com/ugd/97634b_bc836ef7048946e9bae706647a1e1e76.pdf
- https://static.usrfiles.com/ugd/b77b08_0bed51d0e3364ac4996815092e03b02c.pdf
- https://static.usrfiles.com/ugd/4d935e_57abfd48d9a84c6a92e95ecf10549dfe.pdf
- https://static.usrfiles.com/ugd/2f8cea_167b3413da724757b402be40d1627dbd.pdf
- https://cdn.shopify.com/s/files/1/0433/6559/7342/files/phytochemical_analysis_of_vernonia_amygdalina.pdf
- https://cdn.shopify.com/s/files/1/0428/3006/9927/files/auditing_fundamentals_in_telugu.pdf
- https://cdn.shopify.com/s/files/1/0461/4455/3123/files/sql_queries_for_mere_mortals_3rd_edition_download.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.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_off000064dd.bin` `7f7e92d86ed07106daa3e1dddc15a45332e8334cc591450f8a18d3131027a8e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64DD	5204 bytes
`font_01_sfnt_off00007699.bin` `d1d813bac7ddc751876c0024420e37c68b2ed0ba02ff8e1e90e65c5a747184f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7699	10636 bytes

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