Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f7de8e404e60df…

MALICIOUS

PDF

51.2 KB Created: 2020-08-30 02:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01bf8107bf9af673c33c03e8fdd05872 SHA-1: 0ed8316390f5ff9864a84d90e55ebc61e45cfbe9 SHA-256: 35f7de8e404e60df2a93a6fd33fb65191257333e615bd5265ea806891e5f1a31
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to 'blue mountain community college'. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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.club/wix?keyword=blue+mountain+community+college
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/22155026630.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/570889995.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/ethics_for_information_age_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/5026782098.pdf
    • https://static.usrfiles.com/ugd/f09a9d_bb8ef447b44b45c595e693434fe1bd03.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5dd74ee3ad4427f93df57699b33fe1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0564db30819642d980ce7fa014338bad.pdf
    • https://static.usrfiles.com/ugd/3826db_69fe697f6165474fba7c68278f511527.pdf
    • https://static.usrfiles.com/ugd/b8c837_34adb5eaa6b245c2b452b7330120860a.pdf
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/99549145856.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0095/files/review_breast_pump_manual_yang_bagus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3440/2216/files/medical_dictionary_english_to_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/rifanarogovejor.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_off00007bd0.bin
02ea9436e00fd74c84da778d38d4c4a839a48d66d11d74a9ae4a41e58323f68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD0 4876 bytes
font_01_sfnt_off00008c5c.bin
b732fbd75ec964c30d16840b8d540a957a0dfc7bd75cf1fedca840f1ce820e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5C 10568 bytes
font_02_sfnt_off0000b066.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB066 4324 bytes

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