Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fb2bd4e5c486d7…

MALICIOUS

PDF

40.8 KB Created: 2020-07-11 05:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4063e3da763ebc5aa17a7cb9c067830a SHA-1: ca35888460525f032ab6f36a43bbcee98651a84b SHA-256: 42fb2bd4e5c486d7bdfba37b88cf38f16326811a24102a669c4f52dfbf5fc0ad
120 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 of which point to a redirector service and then to other PDF files, indicating a link farm designed for SEO manipulation or malicious redirection. One of the primary links, 'https://ttraff.com/pify?keyword=animal+farm+chapters+summary+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Animal farm chapters summary pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent of the embedded links.

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=animal+farm+chapters+summary+pdf
    • http://files.sunshinecoastenglish.com/uploads/1/3/0/7/130739982/661f22e86.pdf
    • http://files.1uptoronto.org/uploads/1/3/0/7/130775629/nosigipesevonozugi.pdf
    • http://files.live-arts.co.uk/uploads/1/3/2/7/132712326/dazenanubeleja-rilegow-sudibebogakob.pdf
    • http://files.scottontherocks.com/uploads/1/3/1/1/131163561/xesajusimeguv_teganosanol_gatumi.pdf
    • http://files.insights4less.com/uploads/1/3/1/4/131407102/begabutirobuzi.pdf
    • http://files.crossroadsambulance.com/uploads/1/3/1/4/131454355/a0de47.pdf
    • https://xabofufutin.files.wordpress.com/2020/06/wumitez.pdf
    • https://tovudut.files.wordpress.com/2020/06/3543167879.pdf
    • https://kigedor.files.wordpress.com/2020/06/8720123244.pdf
    • https://verepekom.files.wordpress.com/2020/07/16694142168.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/94546696277.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/tunonazozaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/15369587076.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_off00006586.bin
a1030d206c4a08f6e7a943daebafbaebf6f35ebe09ca978a6327992100345c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 5256 bytes
font_01_sfnt_off0000772d.bin
f9e81d34b62b03d1576c3b8700bbc87ca97d716e5a9abeb67d94e76d02ca0049
pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 9168 bytes