Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e894e9cd2b6aa3…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 16:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6586b4fce3f69612e0147a5cd12fc92d SHA-1: 4d2a92cfc81e23aa8a341b3d80803a3c7e0faaf8 SHA-256: 81e894e9cd2b6aa30ae4b7576135c5e4f40821fe764a571e2dddd6983924a872
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to a 'Cypress mtn ski report', suggesting a lure to disguise the malicious intent. The primary malicious URL is https://ttraff.cc/pify?keyword=cypress+mtn+ski+report, which is likely used to redirect the user to a second-stage payload.

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/pify?keyword=cypress+mtn+ski+report
    • http://files.menorthwest.org/uploads/1/3/1/4/131454501/fasoxevubagopa-bemixuseguwaba-kezejidivogote-kebulaka.pdf
    • http://files.essenceofgracearomatherapycenter.com/uploads/1/3/1/3/131382387/tibuvosuvutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/roxajabidexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/mivekupidawetutimosuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/26345227889.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/53493310566.pdf
    • https://cdn.shopify.com/s/files/1/0463/4132/4962/files/gabiserutimujufafusojuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/redojezulufizugewebiwav.pdf
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/macroeconomics_5th_edition_williamson.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/jikipubosofaromi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/14471085213.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/3375750544.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/39334972703.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_off000056f5.bin
98efd896558ec75b60c2c254b6a8e3b8613d1743a569985546be18869140eca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F5 4792 bytes
font_01_sfnt_off00006736.bin
db273585b78e22612d6087c336c58ded4046d0433d0a083dd3e83c4123758f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 9912 bytes

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