PDF malware analysis — malicious · f13e11b371dc6980

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 23:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7c9355a528afdedba54b6cd6142001d5 SHA-1: 70b421f5da7929e86fc0c608ae54e10886f114d1 SHA-256: f13e11b371dc6980655c41cc2e3fcf08d84c8c5a3b85bce8a99b0e00da099be6

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=problemas+de+matematicas+5+primaria+interactivos'. This URL is likely part of a phishing or scam campaign. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. While some of these external links are marked as benign, the primary redirector is suspicious and indicates an attempt to lead the user to a malicious site, likely for credential harvesting or malware distribution.

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=problemas+de+matematicas+5+primaria+interactivos
- https://static.usrfiles.com/ugd/b8c837_3530116795124ea89eb023bed97bc3cc.pdf
- https://static.usrfiles.com/ugd/e3ed1f_5edd1a98accc45618181664c91abe875.pdf
- https://static.usrfiles.com/ugd/5438e3_64fdc18caf95496baeda6d6969827672.pdf
- https://static.usrfiles.com/ugd/b8c837_7a9a48cdaf0d4a12b9854da07d65e756.pdf
- https://static.usrfiles.com/ugd/b8c837_c6574de862bd4d0eb82da68d5e67e820.pdf
- https://static.usrfiles.com/ugd/b8c837_5d1585b03d2447ef80abc8ce87e08c31.pdf
- https://static.usrfiles.com/ugd/07e02c_1b9814f9750444e8827f4dc77349bccc.pdf
- https://static.usrfiles.com/ugd/b8c837_0966f76519d5435fb58d3384d9b6cfcb.pdf
- https://static.usrfiles.com/ugd/cf14a4_9babf58e1b5b4cc69834928113a30eef.pdf
- https://static.usrfiles.com/ugd/0d089b_5a535e100ade4de4bd10498d6bbb888a.pdf
- https://static.usrfiles.com/ugd/b8c837_d49cddcac9fe473ba4c0d60ba5c2a61f.pdf
- https://static.usrfiles.com/ugd/b8c837_ec6dc4abfed24e0485d191fad560d80a.pdf
- https://static.usrfiles.com/ugd/b8c837_4a5292da23ce48898edcd08b9f4abffa.pdf
- https://static.usrfiles.com/ugd/b8c837_0b0249a0f167409894c615ff94ea4830.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_off00004ad6.bin` `8c2b304a339014d4d0435f448e2f83a3503af3d46157ec7d492c154624171fbb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AD6	5332 bytes
`font_01_sfnt_off00005cd2.bin` `f663dd54a90f09c839a105f3ece5460c0ef1543bbd78035d5b821f69bb6b68cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CD2	11672 bytes
`font_02_sfnt_off0000823b.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x823B	4324 bytes

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