Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5152e5ecc848ded…

MALICIOUS

PDF

50.8 KB Created: 2020-07-09 01:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b0731984c19e8774da08f4a2fe911f SHA-1: d7d2c6d8c950ebd0f03e403826b71ad26e4936b7 SHA-256: b5152e5ecc848ded57fbf006d76799a82305e9025a15310240e9aecc26990598
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=adjective%20worksheets%20pdf%20middle%20school'. This suggests the document is part of a link farm designed to distribute malicious content or phish for information. No scripts were extracted from this sample.

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.cc/wb?keyword=adjective%20worksheets%20pdf%20middle%20school
    • http://files.theworldofmcewan.com/uploads/1/3/0/7/130738814/gibaja_tawix_wododibura_musimetal.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.midwestnettingsolutions.com/uploads/1/3/1/4/131408546/bazoselikidesoxirino.pdf
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdf
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdf
    • http://files.perashlaw.com/uploads/1/3/0/7/130776567/3934b571d.pdf
    • http://files.msumun.org/uploads/1/3/1/4/131409244/5567197.pdf
    • http://files.openmul.org/uploads/1/3/1/4/131454109/eaa307.pdf
    • http://files.sustainabilityiscool.com/uploads/1/3/0/7/130739891/a856abfa.pdf
    • http://files.bizkidz.us/uploads/1/3/2/6/132681409/nojuwekuwite.pdf
    • https://vukomalej.files.wordpress.com/2020/07/bupumuwixixobize.pdf
    • https://vupujejuwozo.files.wordpress.com/2020/07/44447794135.pdf
    • https://nomakegune.files.wordpress.com/2020/06/vodugujetilujenem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.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_off00008741.bin
20e9ed3e056078fe11699ca9b16179b4c6299f9e7d805eebcb97acfbc910bb42
pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 5148 bytes
font_01_sfnt_off000098db.bin
15983787f96cd5de7fd4440f66585b0f1b91625b145b5c7a756efe2bd37c4315
pdf-font-stream PDF embedded font (sfnt) at offset 0x98DB 11676 bytes