Malicious PDF — malware analysis report

Static analysis result for SHA-256 c911067494d0a76c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 11:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9b0c6e9dee8661032ee978445ef890 SHA-1: 83e905d8da716fb681da987365f9e779b1301418 SHA-256: c911067494d0a76c4240149c4c28835581b039748366c35ef6fe60930f39e7c8
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 cdn.shopify.com. One of these links, https://ttraff.cc/wix?keyword=alfred%2527s+basic+piano+library+theor, is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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.cc/wix?keyword=alfred%2527s+basic+piano+library+theor
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/ahindra_ghosh.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/rock_the_party_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/98748109716.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0463/6200/1563/files/buyers_guide_insurance.pdf
    • https://static.usrfiles.com/ugd/822ecd_3e99fccfb252486da54964ca925065d0.pdf
    • https://static.usrfiles.com/ugd/c618e9_f13f5536f53043b7b3f472938246d60b.pdf
    • https://static.usrfiles.com/ugd/b11f6d_a036c62fcbc24cbc8a57a060279c1b75.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f9da9d239c04b9490fcdb421235720b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b7170ea93f486198b35239bbecb89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_029771cc94794afeb1f2d724146955ac.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/jefunez.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/3142319729.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_off0000440a.bin
ec44b14a4bbd0f3d791a29d5364e5a0c113d53eede017e9461dc761174cec57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x440A 5508 bytes
font_01_sfnt_off000056bc.bin
ba80df3b24c77fbdbaf9f7145459962efeb484dea99c7179520d042ecc0983e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BC 9520 bytes

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