Malicious PDF — malware analysis report

Static analysis result for SHA-256 096dcba42c925565…

MALICIOUS

PDF

58.6 KB Created: 2020-08-02 11:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf16eee82f01db7edd046f1b1237798a SHA-1: 6d4417eebb28cab434deaedc2f8b1f0163b34c37 SHA-256: 096dcba42c925565a3e05da4bd04bd53a064eb0c82e7271f13a882af7aafe032
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document's content and structure strongly indicate an advance-fee scam, aiming to trick users into clicking malicious links under the guise of prize or delivery notifications. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=campbell+and+reece+biology+9th+edition+pdf
    • http://files.cosmicguloso.com/uploads/1/3/1/4/131407511/f9495e35fa6.pdf
    • http://files.almeria-estates-and-realty.com/uploads/1/3/1/4/131437351/fefozo.pdf
    • http://files.serafinarosen.com/uploads/1/3/0/7/130776381/gaket.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/juwefafamanapikunego.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/64709944491.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/16337506512.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/yang_style_tai_chi_long_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/66322205677.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/7118182150.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/59606531391.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/what_does_gc_mean.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/50258539286.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/14390805594.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5098/files/kuxije.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3447/files/94621537979.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/97914404758.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_off0000a4f1.bin
791cd07739008f29e0f471d1e403130e94cc600ba9df1814753ee7a61995b6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F1 5696 bytes
font_01_sfnt_off0000b822.bin
9dc3bf83b76089ec1243b2557ef1e618f6ae8d8933c79033170103bc509cf925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB822 10840 bytes

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