Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b583253d25018bd…

MALICIOUS

PDF

231.5 KB Created: 2020-07-25 10:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42458a1ff9e3bfae757da352624a555 SHA-1: 0eda554fec22cc21499d38b3713e9950fa3d96c9 SHA-256: 5b583253d25018bd0a9bf2d9f2703fa48bedca9c3c85a44f582b2cc84d33f7ff
142 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 uses advance-fee scam and urgency lures. The embedded URL points to a known malicious redirector, likely leading to a phishing or malware download site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a social engineering attack to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=carotid+endarterectomy+guidelines+2017
    • http://files.living-media.org/uploads/1/3/2/3/132302941/2869425.pdf
    • http://files.saralynnquigley.com/uploads/1/3/1/4/131454190/9082248.pdf
    • http://files.bustihistoricalsociety.com/uploads/1/3/1/4/131453421/nubugo.pdf
    • http://files.stjohnash.org/uploads/1/3/0/8/130814408/wawotesedasorodokip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/zuwudimafuzev.pdf
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/lirabebaximal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/vagolovalofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/29813010488.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/12416498216.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/kalunid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/xenujapejazubave.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/rovafukilujekako.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/sopiraruvolirijebujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/xezitovusezirovamol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/buxamibajikewaxozemuzejif.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000335a4.bin
b7da945e882add8d11fbab54fa7e3092436e8b673b28cdfcb796a438cab1886e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x335A4 5672 bytes
font_01_sfnt_off000348f3.bin
4a8ebc06377b408eb74f848ae2868544b0281ebeecef30e7befac0ea11cac941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x348F3 15456 bytes
font_02_sfnt_off00037999.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37999 16148 bytes

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