Malicious PDF — malware analysis report

Static analysis result for SHA-256 442161c489d3c9fc…

MALICIOUS

PDF

57.2 KB Created: 2020-08-22 00:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd2b6b9014f73b966657d6dd5f4826e SHA-1: e95e6b1c8944b7edc0a3c7019ebc198214f982b5 SHA-256: 442161c489d3c9fc2cb163f8ef585b1a95077f7d049437d64a43218fb43c02af
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=certyfikaty+depozytowe+s%25C4%2585+form%25C4%2585, which is part of a redirection scheme. The document body, though heavily obfuscated, contains references to this URL, suggesting its use in a lure. The presence of numerous external links points towards an attempt to distribute malicious content or conduct phishing operations.

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/pify?keyword=certyfikaty+depozytowe+s%25C4%2585+form%25C4%2585
    • http://files.matthewshannon.net/uploads/1/3/1/3/131384169/4a04ffdca6.pdf
    • http://lizivo.jerseygreenroomclub.com/uploads/1/3/0/9/130969465/71da112e7.pdf
    • http://files.yonispretzelchallah.com/uploads/1/3/0/7/130738751/mawudujo_kituwudomut_belobusujajaf_tagepoba.pdf
    • http://mumiko.justicecollaborativeatcornell.com/uploads/1/3/2/7/132740836/romososo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/primary_site_of_white_blood_cell_formation.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/80528272789.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/full_detail_of_gst.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/lilad.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/affidavit_of_support_form_i-_864_example.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/39707770317.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/dsm_casebook.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/digesting_a_deposition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/xinezararuratilupil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/revision_sheets_for_kg1.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_off0000905a.bin
87cc6d99b142a6fac2dbe4892b7168ecd91bbc48dd43bfae5ae1cbaf70136c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905A 5640 bytes
font_01_sfnt_off0000a2ff.bin
187615683114be146d0218939e350f546c8c5d4c74a5d2a2bb604cb3d67f962a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FF 17548 bytes

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