Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8294d444ef06237…

MALICIOUS

PDF

45.4 KB Created: 2020-07-28 08:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680cf265922188b08d6f4e82ddbc2a30 SHA-1: a223428d2c5251519f98d20892723d04515037e0 SHA-256: b8294d444ef062371fdcfe36e50a82dca5209817e88f71b22b35c242df9a5e02
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document is designed to lead the user to a malicious site. Additionally, a large number of external PDF links were found, suggesting a link farm tactic. The presence of a 'download button' heuristic further supports a lure-based attack. No scripts were extracted, but the combination of the redirector and link farm strongly suggests a phishing or scam attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=cursive+tracing+worksheets+pdf
    • http://files.visualisenewzealand.com/uploads/1/3/0/9/130969389/7966416.pdf
    • http://files.dirtdogs03kubo.com/uploads/1/3/2/3/132303286/juditop-bonex.pdf
    • http://files.myapptv.com/uploads/1/3/1/8/131858592/5e0d3a.pdf
    • http://files.yosemitewawonacharter.org/uploads/1/3/2/6/132695714/fakatavum.pdf
    • http://files.yos
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/59676242572.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/6447030194.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/vefogabolikaxetob.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9003/files/zatugokewipobejib.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/pifudababatopojuti.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/26688371305.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/nemizemasomivibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/wuzorejajixudiwedebemave.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/zowevusurej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/92101899772.pdf
    • https://cdn.shopify.com/s/files/1/0435/9654/6216/files/30439714715.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_off00006ae9.bin
6bfdec54ad6b6b4809bcf5943d7c2bec1d2bc2832d908aae278f4abde97702c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE9 5504 bytes
font_01_sfnt_off00007db3.bin
c61719b813e9462cb96d11e8911759442614198c2cab3996ea9f64e83c5273fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB3 13420 bytes