Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd98355ad08e95b5…

MALICIOUS

PDF

47.3 KB Created: 2020-08-28 20:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d662d7be25390cff8d7cddae5259ce9 SHA-1: 910f0663c33fc8d2afcad2277c41f378b354170e SHA-256: bd98355ad08e95b556c78ae8b84c2da0994fcac66b3488e45a1d1eff3d7a7f57
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, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://ttraff.com/wix?keyword=movimientos+literarios+de+la+epoca+a, is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains a mix of text and what appears to be binary data, but the presence of numerous links strongly suggests a phishing or redirection attempt.

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=movimientos+literarios+de+la+epoca+a
    • https://static.usrfiles.com/ugd/b8c837_d9d6be1a28a548239a37b2455aadb723.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b096c093df247f990f3b43c424a6382.pdf
    • https://static.usrfiles.com/ugd/b8c837_86fd3b4a1b0e47df8cd87c2ef50731de.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d8de324a7ad4c1e9be21432f537f8eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb5060f414fa44a087299213ea30f6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7bd45308a040af9b29010b968ec1ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_d60ebab9554d4247b20a0034793baf23.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b7170ea93f486198b35239bbecb89d.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/gk_power_capsule_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/pepesuvawaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/59605189153.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/59283272241.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7151/files/vekonimadetezabedexakug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5445/7254/files/94717609632.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/marine_net_corporals_course_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/nateta.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/past_simple_exercises_easy.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.

FilenameKindSourceSize
font_00_sfnt_off00007867.bin
41c27485196af82b0006b3accc413685d3156cc29ab32aea9f6879361c25109a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7867 5284 bytes
font_01_sfnt_off00008a4c.bin
61817508f2c59a5f3f26d72f2964e0315ec8bf3708cdc9dcacd0805a6bf87b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 11160 bytes

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