Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f2500da9c8a568…

MALICIOUS

PDF

50.8 KB Created: 2020-08-03 12:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 610161c93d6810159198359b5cce5e92 SHA-1: 7f859121016fe572575905dae61c47fe5f6e21c1 SHA-256: 23f2500da9c8a568563f35f8513c2bb2074542dc8d6118133eae20c72ff47689
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. This suggests a link farm or redirection strategy to obscure the ultimate destination. The primary malicious URL identified is https://ttraff.ru/pify?keyword=asfixia+perinatal+gpc+pdf. No scripts were extracted, and the document body is largely unreadable binary data.

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.ru/pify?keyword=asfixia+perinatal+gpc+pdf
    • http://files.northlandquiltersguild.com/uploads/1/3/0/7/130775734/9757093.pdf
    • http://files.manalgarciafitness.com/uploads/1/3/0/9/130969139/05dc13c35e5a.pdf
    • http://files.vnannj.org/uploads/1/3/2/6/132681342/2435971.pdf
    • http://files.zrscg.com/uploads/1/3/1/4/131414134/kugefo_kijoga_pejanetaxe_tixisaxuzixow.pdf
    • http://files.bulutmak.net/uploads/1/3/1/4/131406885/sasofivi-fowazevozuwad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/palumopojanuneposalani.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/fesofixufojori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/auto_tune_efx_crack.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0314/files/rugefos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/besowovowobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/defepoberotoluvonij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/minavalimefalire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/vabinalideje.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/dolekavejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/50452636638.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_off00008918.bin
a5ee015373c1d318a6e6cfbf99990d6abdd3002418f24201cf4cd1325f328488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8918 5380 bytes
font_01_sfnt_off00009b7d.bin
a31660eaedee2d89fba4595c26f2c9e46c54dbef8f4e43db1f00f788db5bc38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7D 10184 bytes

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