Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6281fe9be8d8e72…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 14:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04eef48f339c8984621fcd843a7fd09a SHA-1: e25dc75d081b1d7f495732209b4858db2210d2ce SHA-256: e6281fe9be8d8e7209b2eb1b36857466679e3022ce961c55b47ebb1679d20e89
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'less than greater than worksheet for kindergarten' and the malicious URL, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.com/wb?keyword=less%20than%20greater%20than%20worksheet%20for%20kindergarten
    • http://fijomen.tarkineassociationvictoria.com/uploads/1/3/2/6/132681352/9469957.pdf
    • http://files.ourheritagehearts.com/uploads/1/3/1/3/131384636/fomagudidewif.pdf
    • http://xugaf.gracereformed.co.za/uploads/1/3/0/8/130874457/6384100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/rinutowabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/bobujakazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/8909603388.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/bijopesekazabibadireko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/najumik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/bamidulobonamadojotimexat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/meturagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/gosaxufukosakasiwadikosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3754/8959/files/50720702224.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/17092074212.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/6324224681.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/mefelovexaxodotix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/lagepogomexujuxapowup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059de.bin
fcee4ef45b5d000edc077bb8bf0f4dbe268c5417b0d8740dbaa81702ae87688e
pdf-font-stream PDF embedded font (sfnt) at offset 0x59DE 5020 bytes
font_01_sfnt_off00006af1.bin
0249b37a07fbfa4e7e6d873bc0c4921ca72517b4f8b3a5c60cf0abc8e87aa3ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF1 9908 bytes
font_02_sfnt_off00008ccc.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCC 4324 bytes