Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3739bd8f129e06…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 23:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cbdc26fdff43cd383e57eea33518898 SHA-1: e3490276688d44fde7098467e70ac75ce4861ab8 SHA-256: 3c3739bd8f129e06e164a3466063644932f7908e1e9fd2a57eaa17952b0179ba
120 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.com, which is disguised as a 'classification of plants worksheet'. This redirector then leads to a link farm of 28 other PDFs hosted on Shopify. The primary intent appears to be to drive traffic to malicious infrastructure through a deceptive lure.

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=classification+of+plants+worksheet
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/japaxegutazelabofoxekik.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/supowosapavevives.pdf
    • https://cdn.shopify.com/s/files/1/0438/3267/2413/files/45246148983.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/99943088583.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/32041892171.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/kml_to_csv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/57665480256.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/54273155846.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/ragow.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/free_download_foxit_reader_for_windows_xp.pdf
    • https://static.usrfiles.com/ugd/36f25b_58d3c2f86a724b0da66772fc07b13448.pdf
    • https://static.usrfiles.com/ugd/be19e1_9a5ccff8164c4a59a3b2ff827887304c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2980f03b62a040bf9d78b0240be816ca.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_off00006418.bin
b32a43e7e92990f93d6f478a8fb9c57b11046145bfe531fb61d3281ee539eb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5164 bytes
font_01_sfnt_off000075b6.bin
98595fca7d5219729876db0dbc8858d3c873ba1b424cbea4189e756f2146f56e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10364 bytes

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