Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7d8f6b13984d8b…

MALICIOUS

PDF

56.2 KB Created: 2020-09-01 18:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a99583d1e9805ac591f906883ff106 SHA-1: fd59edf05ffbd3941e3b46665bc54da1a150d208 SHA-256: cd7d8f6b13984d8b5f2ad77b33b80453ebfd021dc5c77a02185102c7fc49df01
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this malicious redirector. The primary purpose appears to be directing users to a potentially harmful site via a deceptive link.

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=anemia+de+celulas+falciforme+pediatria+pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/eventually_synonym_formal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/food_cost_formula_in_hotels.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/attestazione_di_conformit_cartaceo_avvocato.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/dawitajitesepado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajakeveposemilakojataza.pdf
    • https://static.usrfiles.com/ugd/9cc572_4ecebe473d1e4b9ea8b2fd1a6cf38427.pdf
    • https://cdn.shopify.com/s/files/1/0437/3001/0273/files/vmware_unlocker_permission_denied.pdf
    • https://cdn.shopify.com/s/files/1/0461/7096/4131/files/69131696964.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/vilobexugagevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/24556767833.pdf
    • https://cdn.shopify.com/s/files/1/0443/6302/2492/files/migimar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0252/6872/files/liberalismo_economico_libro.pdf
    • https://doi.org/10.29375/01237047.2378
    • 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_off00009db5.bin
07eeb80737bc8902cc1c9f2c840c2181157f1a20934812bae569724dd311ab47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB5 5288 bytes
font_01_sfnt_off0000af9f.bin
5bb800de8a801557347c37b27cf7c4900d88e8b2953c6f96736a5a1fdef750b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9F 10624 bytes

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