Malicious PDF — malware analysis report

Static analysis result for SHA-256 3547df728564a310…

MALICIOUS

PDF

46.3 KB Created: 2020-08-13 10:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf372bb543a6fa546d22e2053ee47996 SHA-1: 181aee3584a0bce9190c38f677078e3dccbef587 SHA-256: 3547df728564a310b6d26e74102a3135338be26f154e812ac383b5fdfaf6d373
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a 'radioactivity half life worksheet'. The presence of numerous external links, many pointing to Shopify-hosted PDFs, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious link. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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.cc/wb?keyword=radioactivity%20half%20life%20worksheet
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131406182/pixudekabaz.pdf
    • http://files.spencercountygop.com/uploads/1/3/1/3/131382092/1cd6548.pdf
    • http://files.chateaumae.com/uploads/1/3/0/7/130776225/f10185e926945.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/76949380453.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/glencoe_algebra_2_chapter_4_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/46234927794.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/22185319822.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/zewavizomezixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/pevapapiluwejemukoxigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/tujokowakerasogemejox.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/walaponorinofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/81197109191.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/rubivip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/kutobaparij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600a.bin
533d56c029c2a8a38cd79a0b97d841cf00e0ee22f8acd9e35756dfe70bd04768
pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 5116 bytes
font_01_sfnt_off000071a4.bin
72a36379c2592a38313c231d10eb3add1fd5698894a3ea33726c3c1fdb3aa6f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A4 14100 bytes
font_02_sfnt_off00009e42.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E42 4324 bytes