Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f64c9068981e67a…

MALICIOUS

PDF

53.6 KB Created: 2020-07-27 23:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94d86f0d63401d02f192a41e4995a33f SHA-1: bc40f75a93e8894ba75ce6cef25256d2b09e07d5 SHA-256: 3f64c9068981e67a2a227ef8b409954ebfbb5cef1f04de9add3f8f36a0d748b9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains heuristics indicating it's a malicious redirector and part of a link farm, specifically using a fake invoice lure. The primary malicious URL, 'https://ttraff.ru/pify?keyword=school+budget+management+pdf', is designed to redirect users. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at directing users to malicious sites.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=school+budget+management+pdf
    • http://files.theartoftoast.com/uploads/1/3/1/3/131380511/vowezagejifuru-guvidevowowawov-fususejemudi.pdf
    • http://files.clubcollege-bound.com/uploads/1/3/2/7/132710678/7a98010460.pdf
    • http://files.dickbrown.us/uploads/1/3/0/7/130739232/e9d54.pdf
    • http://files.killjoy.info/uploads/1/3/1/3/131398605/xadaripivoz.pdf
    • http://files.flexgangent.com/uploads/1/3/2/6/132681617/mejokaxexidu-mekuwugu-gexasonevefevup.pdf
    • http://ithesis-
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/lujuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/50870932814.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/28748121700.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/98240297380.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/tirosanimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/sefiwupexozelugire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/41991437643.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/28209807980.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/42813415094.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/1213056378.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/nulavexabebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/roxewobifufoguxitavaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/muxof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/divedutixivene.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_off000086d6.bin
ce268e76b77297e1fdf3f3d64d1e8b7b1aef3b0b17500e2ddddacc23dc1b4464
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D6 5372 bytes
font_01_sfnt_off000098f3.bin
7671201a37bba7c7050e340bb30140d7818af9a396b62812b20cee14c30fe78f
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F3 14916 bytes