Malicious PDF — malware analysis report

Static analysis result for SHA-256 546e5fc681b4fae4…

MALICIOUS

PDF

51.5 KB Created: 2020-08-04 13:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af32f7f685d97a16ca7edb857d6dcf42 SHA-1: 73048e4e0b8d1cc8bb0f97a7d31f4cd215fb592f SHA-256: 546e5fc681b4fae4ed1c37547c7fc6cbe88a767f09f74b70057e7a09c68a2f88
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'aiou solved assignment spring 2020 pdf' and the malicious URL, suggesting a lure for academic-related phishing. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the phishing or spamming nature of the document. 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.com/pify?keyword=aiou+solved+assignment+spring+2020+pdf
    • http://files.gemmacrow.com/uploads/1/3/2/7/132740836/mofalewebafu-mawijofodenaweg.pdf
    • http://files.tilliesschoolofperformingarts.com/uploads/1/3/0/7/130775172/874441.pdf
    • http://bowenoru.marmatoncc.net/uploads/1/3/2/6/132683188/5295908.pdf
    • http://files.iamroyalheir.com/uploads/1/3/1/4/131438044/9328701.pdf
    • http://files.wetfutures.eu/uploads/1/3/0/7/130739704/dewubi-fulave.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/30271956620.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/74152045399.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8324/files/jojezezoweben.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/nibomuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/sigak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/luzewutixejota.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/classical_mechanics_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89120683065.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/vumokatinileletoligazux.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/28484331939.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/11435729959.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/pokemon_emerald_ev_training.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_off00007c7c.bin
4911e20fcddeb0331804f693bfbfece4869879d34713883f1aeedad8a2288de1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7C 5564 bytes
font_01_sfnt_off00008f52.bin
6e3ecc01153fc7383637e085407b0732b1402c9fba06c8327da40a02e80038e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F52 10244 bytes
font_02_sfnt_off0000b250.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xB250 4324 bytes