PDF malware analysis — malicious · f10a333254627881

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 01:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 801400ec7f12515336856bf187a6c583 SHA-1: 201dfbeeacc2804952782d60a11f8f824582b803 SHA-256: f10a333254627881c2a02384fb2c5d3118b5200045494e8cc4fc9620e54bd73f

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector service, 'ttraff.me', which likely serves to obscure the ultimate malicious destination. While many other links point to 'static.usrfiles.com', their sheer volume and the presence of the redirector suggest a coordinated effort to lure users to malicious content.

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=autobiographers+and+diarists+answers
- https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
- https://static.usrfiles.com/ugd/b8c837_6aa02dfbc19a40b0bcf3d18e729227ca.pdf
- https://static.usrfiles.com/ugd/b4a829_428d7520d1294057b21447c3f0546318.pdf
- https://static.usrfiles.com/ugd/3b47cb_0bab8af6a5e048de847ba29ac6712ba8.pdf
- https://static.usrfiles.com/ugd/9734e7_209d8c877956498882dbfdd2e5e12b07.pdf
- https://static.usrfiles.com/ugd/b8c837_7a7bfa148a58420d9e372c99d0b7c051.pdf
- https://static.usrfiles.com/ugd/b8c837_abb20bad16374a96ba6a072e9a25c470.pdf
- https://static.usrfiles.com/ugd/80c1db_e8d5556fe88b48b0ba6daaa5d9712afc.pdf
- https://static.usrfiles.com/ugd/b8c837_f8cd5ee44960487a982fb377bac65caf.pdf
- https://static.usrfiles.com/ugd/12745a_04173d1355374256bcbda0ec66f54b54.pdf
- https://static.usrfiles.com/ugd/d902bb_06186ce1d3704b85ae88dafee8d04785.pdf
- https://static.usrfiles.com/ugd/fe83c3_da4ff7ab943846a68ca5e2591de406f2.pdf
- https://static.usrfiles.com/ugd/2e4eb4_8f605f9c1e054e83a3f9d7ab99a2bdfe.pdf
- https://static.usrfiles.com/ugd/4b874d_bf17427533e043e4be2e76c61c271eca.pdf
- https://static.usrfiles.com/ugd/b5aed9_cb582d4981904995985cf28e10ce302b.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_off00004abf.bin` `325f515080bba25dbc7420fa9a994cd2346f7c97ffbdf8c0ac76e1d17dc91451`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4ABF	5408 bytes
`font_01_sfnt_off00005d25.bin` `cbaae66c456f8def9747e52b0722b786db4e7bb78076eea1e6942d9de3be5403`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D25	10428 bytes

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