Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b12a756e66e9b9b…

MALICIOUS

PDF

77.4 KB Created: 2020-09-01 17:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01aea322e8714e9db90d8dd0687bfc43 SHA-1: 1f797a8af98e6cc8cf358d2913b70b3bae9c675b SHA-256: 4b12a756e66e9b9ba7397909d6d0e661ae29c422e07f2dfd7a5354d6ccae7064
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=cursive+worksheets+for+middle+school'. This suggests a phishing or scam attempt disguised as educational material. The PDF also exhibits characteristics of a link farm, likely for SEO manipulation to drive traffic to malicious sites. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.ru/wix?keyword=cursive+worksheets+for+middle+school
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/15511817294.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/81352690064.pdf
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/30784266960.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/free_grade_curve_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/37586501671.pdf
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/fine_aggregate_in_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/avoir_conjugation_worksheet.pdf
    • https://static.usrfiles.com/ugd/930050_c1cd47df5dbf47879f650c7ab5727387.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c48d43239c4d2bab577530a053b922.pdf
    • https://static.usrfiles.com/ugd/b8c837_d29235c1929843d69cb03509ddb847cf.pdf
    • https://static.usrfiles.com/ugd/e2c250_6c965c7b454e4ac3a0537aaaf99ba2f5.pdf
    • https://static.usrfiles.com/ugd/3cb679_78e0214c245142738cb8faad8622b7df.pdf
    • https://static.usrfiles.com/ugd/edb4a7_405d534ada8a4d7e8a00686d4131a076.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_off0000e4ee.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 2828 bytes
font_01_sfnt_off0000eee8.bin
c05d29d3f3111a4015f71514b5dd51ce0ac2f90eaaa084f9f832b7d5e69e4ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 5172 bytes
font_02_sfnt_off0001006f.bin
d92e86427ac7695a595ba442c99a9a1c0970532be96b9258db0809f8cad32077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 12476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.