Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b28231cdc52238…

MALICIOUS

PDF

59.2 KB Created: 2020-08-24 00:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5495dbcd5876eb27e3dbf63d33803146 SHA-1: f093f66769ecc98c711dfef0b9898701e8adb9c5 SHA-256: 19b28231cdc5223849d57908900474fad12f209228cfba85f15a29f39087eee8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it's a malicious redirector and an advance-fee scam lure. The embedded URL https://ttraff.cc/pify?keyword=burnout+3+ost is flagged as malicious. Although no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest a phishing attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=burnout+3+ost
    • http://fodeti.nigelgorskiconsulting.co.uk/uploads/1/3/0/7/130775565/7805eb6002.pdf
    • http://tapuze.asifthinkingmatters.com/uploads/1/3/1/3/131398362/suxiva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/winedabutazitebapugasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/8_house_bjarke_ingels.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/big-_ip_edge_client.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/55041448458.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/majevugimuzirezudid.pdf
    • https://cdn.shopify.com/s/files/1/0461/3858/9352/files/71198612444.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/97519311845.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab23.bin
8cd7e1ca8fe458b01f1d7c0d4a26bec80969501cb4df77f4d8b6c4f4a0fc1e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB23 4648 bytes
font_01_sfnt_off0000bb01.bin
e8389ebd4cbc2c4d54607b45a0d1f7b720e827428c38fc46a4c5da48c6787334		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB01 10640 bytes

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