Malicious PDF — malware analysis report

Static analysis result for SHA-256 870154c3b3203900…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 03:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6791aa6ba2816a3c443d406866b4bd87 SHA-1: 0b35e931398613c8532031c0e771d64ea6029fbd SHA-256: 870154c3b3203900a25dca52b01f4f8e296ab99fc08d884671942e971d838e47
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to PDF downloads, reinforcing the lure. The heuristic firings indicate the PDF is intentionally structured to link to malicious infrastructure.

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/pify?keyword=netnography+doing+ethnographic+research+online+pdf+download
    • http://files.continuumsofservice.org/uploads/1/3/0/7/130739348/8115856.pdf
    • http://files.skyboxct.com/uploads/1/3/1/4/131410234/28e68886.pdf
    • http://files.inveniremedicos.com/uploads/1/3/1/6/131607467/694ad39.pdf
    • http://files.eullallia.com/uploads/1/3/1/1/131164129/580288.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/lodomil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/49328861935.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/jivuluz.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/rorubidikezikebafap.pdf
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/www_startright_bokf_com.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/18850369046.pdf
    • https://cdn.shopify.com/s/files/1/0432/8757/6740/files/zikowonenefojuxigizirogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/nobubemupefedunuked.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/12311678683.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/loluw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/limarigunefudixo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1944/files/digogupag.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.

FilenameKindSourceSize
font_00_sfnt_off000065e4.bin
484e638607bf054f3644ec0efe6f5f917d2dd6ff91ed28d2a34d6d08647ff561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5580 bytes
font_01_sfnt_off000078ff.bin
3c602414f50e18e783fe1ac1d7371786313a1d4f885f786f07567155d2d3d42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FF 10224 bytes
font_02_sfnt_off00009c24.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C24 16312 bytes

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