Malicious PDF — malware analysis report

Static analysis result for SHA-256 78908711e61cef95…

MALICIOUS

PDF

71.4 KB Created: 2020-08-10 13:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5925742f61ca1f29481374043c033ff2 SHA-1: 8da8acbac26872a14af8a40b25c707a37e5761da SHA-256: 78908711e61cef955ebbf7d0a16e14a8f6848f8c34110d79df7449e3c72a483d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting an advance-fee scam, specifically mentioning lottery or prize language alongside draft/funds wording and parcel delivery requirements. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site, likely to further the scam or deliver a payload.

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.cc/pify?keyword=athol+fugard+plays+pdf
    • http://files.glenoakchurch.org/uploads/1/3/1/4/131438541/2abefc16856.pdf
    • http://files.staplertraining.com/uploads/1/3/1/4/131483386/zegite_tifanazi_sapofadef_foridexar.pdf
    • http://files.al-aidc.org/uploads/1/3/1/4/131483275/66e389ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/mitosis_and_meiosis_stages.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/tepogirefafuwewegudotez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/balarama_malayalam_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/noferabed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/32956986244.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/70775176316.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/x3daudio1_7_dll_is_missing_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/thyroid_dysfunction_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/lekizomofuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/28257722120.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/suvonit.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_off0000cdad.bin
375e781843f419da90773ec1639677bf4b305df9371608b44e914d19a6ba4ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAD 5396 bytes
font_01_sfnt_off0000e00e.bin
81a6b712739fc372a787654ae17cccff4f5c3ff48de5ee52a7440022bff26b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 15256 bytes

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