Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b715f589704bd4…

MALICIOUS

PDF

44.7 KB Created: 2020-07-10 06:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e7f1dca87a3100e5f1b05f7c63097d5 SHA-1: f192e7df7b3c50c72fd6644390f2e42fe9839a27 SHA-256: 39b715f589704bd4ce5f9040f205cad1cb08c3b6d8c11ed5c75a91a871613ef1
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to redirector infrastructure and potentially malicious content. The document body text, though partially corrupted, includes keywords related to a 'psychometrics personality test' and the URLs themselves are structured to appear as if they lead to test results or related documents. This suggests a social engineering attack aimed at tricking users into visiting malicious sites.

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/wb?keyword=psychometrics%20personality%20test%20pdf
    • http://files.ritzemaportfolio.com/uploads/1/3/1/6/131607374/3628317.pdf
    • http://files.grcrowfamily.com/uploads/1/3/1/0/131070190/3426f7e.pdf
    • http://files.1procurementplace.com/uploads/1/3/0/7/130776123/aa4b82bacf2a.pdf
    • http://files.kidsnchordsmusic.com/uploads/1/3/1/4/131437981/naworunapatudomefibu.pdf
    • http://files.eddiecaipo.com/uploads/1/3/1/4/131454436/5393994.pdf
    • http://files.meldongardens.com/uploads/1/3/0/7/130776640/jaxupugemiki.pdf
    • http://files.mnrpcv.org/uploads/1/3/2/3/132303374/664c9be.pdf
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdf
    • http://files.harvestwineoutfitters.com/uploads/1/3/0/7/130775858/32fb651.pdf
    • http://files.stjosephiota.org/uploads/1/3/1/0/131070204/7c92a49ecb4.pdf
    • https://kimuwoduw.files.wordpress.com/2020/06/51463473139.pdf
    • https://kebusura.files.wordpress.com/2020/06/87181025932.pdf
    • https://kekedox.files.wordpress.com/2020/07/jepovabixodopetali.pdf
    • https://fefigubanu.files.wordpress.com/2020/07/31301106021.pdf
    • https://vemupuki.files.wordpress.com/2020/06/63372961130.pdf
    • https://jilanuduk.files.wordpress.com/2020/07/tinefagetapavutepobojagi.pdf
    • https://wuxegura685470280.files.wordpress.com/2020/06/7763296065.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenixuraxolitater.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.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_off00006d98.bin
b114ef71e26ca2a74f97f99d1690ed3588ef236aaa9937f61f06317b830a020a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D98 5284 bytes
font_01_sfnt_off00007f5d.bin
e82c19d768fbd76d59665f7855660562d5244eb4584dee0af625fe60bfd3dabd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5D 11632 bytes