Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a450dcc60706867…

MALICIOUS

PDF

43.4 KB Created: 2020-09-09 07:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be6f4ca8a5f9664d60b529157bf70fd SHA-1: dc886bda98b37c7264b46c6b07e4b0ff2ec012c3 SHA-256: 8a450dcc607068676bf37bcbaa5fc4a8fb407de85326a85e098d7915372b559f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.me/wix?keyword=henry+beaufort+school+ofsted+report'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=henry+beaufort+school+ofsted+report
    • https://static.usrfiles.com/ugd/6c032c_1484dced49d34245b2235274fcd0582c.pdf
    • https://static.usrfiles.com/ugd/64e449_b3f616d5a4ed4b27b4e79f81a680b91c.pdf
    • https://static.usrfiles.com/ugd/7e84b7_aae3453be1e64a8b9ac9d1310da948aa.pdf
    • https://static.usrfiles.com/ugd/162fe6_42ddf39380ea4069977f742072ac0eeb.pdf
    • https://static.usrfiles.com/ugd/96a426_1f4bb2019e514cbda6f25e056d2fa258.pdf
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/pinuwenudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/13384640089.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/rulizolefesozipemedube.pdf
    • https://cdn.shopify.com/s/files/1/0428/8905/2316/files/gamegivumuvinudof.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/android_alarmmanager_not_working_when_app_closed.pdf
    • https://cdn.shopify.com/s/files/1/0437/8604/3541/files/najado.pdf
    • https://cdn.shopify.com/s/files/1/0464/8216/1832/files/bedroom_eyes_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/1349262728.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0550/files/95284612725.pdf
    • https://static.usrfiles.com/ugd/963627_ffb4db2f858345c58cca17af4d2f9479.pdf
    • https://static.usrfiles.com/ugd/6c98bc_692ffb6a9c9546e2b6a0e4949dd233b3.pdf
    • https://static.usrfiles.com/ugd/008e52_eea43fe8f9704010b068c0763d54cbea.pdf
    • https://static.usrfiles.com/ugd/09c3c7_f484fa3969994e33831ed3837b519f5c.pdf
    • https://static.usrfiles.com/ugd/3f4b99_6fda914927854d839520debfcf70e58e.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_off00006a13.bin
a0619c74fa85b883c22be9f679c09faee0a12ba04f9b3aac4dd212c135760774
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 5444 bytes
font_01_sfnt_off00007c92.bin
32739d3558e894bd4170539c95f4b6ab4b35eea05379437e1a7a1dc5e650dd98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 10368 bytes