Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b79a4c509f6d250…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 10:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a62ea97cc9a9130ced83ed2aa0fc21ce SHA-1: 422da9bf2504534cca39ba7169a5485d5b5b4b4a SHA-256: 4b79a4c509f6d250f059128652079048f25b0d845efafe0e8be6c09fc177c8bd
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/wix?keyword=diocesis+de+zamora+michoacan+directo', is flagged as a malicious redirector. This suggests the document is designed to direct users to malicious infrastructure, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=diocesis+de+zamora+michoacan+directo
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/vodowifafulodolenipoveme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/38787814752.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/pirubazitajonedu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/79613998601.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/pamirukud.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc0c4db397c340528d5172c59936b4ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fbd2d066e994924b91262e8908c4f5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fae17ae0c622442c8a7a99995f1026ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/28135572813.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/86493362146.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/ipcc_auditing_standards_notes_for_nov_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/dogigomoleva.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_off00007456.bin
4966ef9f44a5a55519db640d9714b034a9d841a9fa4daa497c5c2b58675260b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 5196 bytes
font_01_sfnt_off000085d9.bin
251c0d0f3c68f9b9cfd783507b379e3401dd227bdc0dbf2d160889eeee04b7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D9 11068 bytes

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