Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2db5703021d494…

MALICIOUS

PDF

63.1 KB Created: 2020-08-11 02:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b13e743193c67351f101ce10ac4990c7 SHA-1: c7e518ed022e2da8b590b05c9d53d21c1c4556cd SHA-256: fb2db5703021d494eefd0afbdd6fbb5fe600b7398a3e2159a485e77dfb633328
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm for SEO manipulation. The primary malicious URL identified is ttraff.com, which is known to host redirectors. While the document body contains text related to a 'series circuit worksheet', this appears to be a lure to disguise the malicious intent of the embedded links. 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=series%20circuit%20worksheet%2014.1
    • http://diwukoxak.myenchantedlocket.com/uploads/1/3/1/8/131856190/puterep.pdf
    • http://files.fourmotion.com/uploads/1/3/0/7/130739780/a21ff8.pdf
    • http://mipazog.goodshepherdbeaverton.org/uploads/1/3/2/3/132302780/2479347.pdf
    • http://files.kingsporthorses.com/uploads/1/3/1/3/131383553/1742861.pdf
    • http://sizukewix.7240club.com/uploads/1/3/1/4/131453060/xelodate_wesofufo_duvotumilokob.pdf
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/redetinofeji.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/rogijabaxiremore.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/what_is_reactive_programming.pdf
    • https://cdn.shopify.com/s/files/1/0436/2105/6672/files/wuririw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/50027467442.pdf
    • https://cdn.shopify.com/s/files/1/0435/7308/4319/files/itunes_64_bit_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/53497856626.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/4189834687.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/kasurokomugexujuminoleje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/sopobato.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/52613098747.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/kappa_alpha_psi_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/90507024563.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/49614497726.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_off0000b92b.bin
35f55e446da833bd332df0e47d6a6748e60122dacfb3cdfba9b2ad9f839088b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB92B 5076 bytes
font_01_sfnt_off0000ca8c.bin
5cff0fc76849fc91eaca6130b166a17780f8f563f62a26f90a7f8149ae9f727b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 10776 bytes