Malicious PDF — malware analysis report

Static analysis result for SHA-256 e113dee0d410723a…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 11:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf71597332abc4427b7ad68afd5728d4 SHA-1: 99ef6546d7914cd1c324a925778ff65ee24473c5 SHA-256: e113dee0d410723a941f1fc6ab642f487c08b14178508336b9ba99e620e7eab7
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a title related to 'Microbiologia medica murray 8va edic' and includes the malicious URL. This suggests a phishing or social engineering attack aiming to redirect the user to a harmful site.

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.com/wix?keyword=microbiologia+medica+murray+8va+edic
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/teniwumoxiwaxipum.pdf
    • https://cdn.shopify.com/s/files/1/0440/7348/4438/files/97837441536.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/parabigawejolokigulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/st_aloysius_school_sadar_jabalpur_admission_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/zoxaribipusijabuwi.pdf
    • https://static.usrfiles.com/ugd/b8c837_d71be1e5321a4eb18819c86c033dffa5.pdf
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/situational_judgement_test_barclays_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/84475161195.pdf
    • https://cdn.shopify.com/s/files/1/0457/5635/0628/files/rivikogilumofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/20143099916.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/56329429182.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_off000050af.bin
95d8323e7fc6debc6c5a26d202a09bc10431c488e570bfe8db3339b0fbea3ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AF 5580 bytes
font_01_sfnt_off000063a8.bin
29d2018e55fafb52e76eb1006578c2e23e5bca847a56fb23b4b231c254d3230d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 10416 bytes

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