Malicious PDF — malware analysis report

Static analysis result for SHA-256 7545efd8bd028633…

MALICIOUS

PDF

427.1 KB Created: 2020-08-10 13:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d6213466324d11c35b130c6739d4c7 SHA-1: b9afdc91dab744408f9121cd7708cc193d57aa52 SHA-256: 7545efd8bd028633d369ee0c0a89c38b5c5f31174d341e95a0c213bb2ad49466
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a malicious redirector and employs advance-fee scam lures, suggesting an attempt to trick users into visiting a malicious URL. The embedded URL `https://ttraff.com/pify?keyword=casebook+of+sherlock+holmes+pdf` is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs point towards a phishing or scam attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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=casebook+of+sherlock+holmes+pdf
    • http://gunisij.pictalie.com/uploads/1/3/1/4/131437987/nidomok.pdf
    • http://files.thinkingcatholic.net/uploads/1/3/0/7/130739621/2873758.pdf
    • http://files.richardreuser.com/uploads/1/3/2/6/132681456/c336422cb4c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/xasoxefamosexituwigil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/fapujalaxa.pdf
    • https://cdn.shopify.com/s/files/1/0447/0548/0858/files/pdf_bookmark_tool.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/daxuruxebobanokus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/pisarorabinerabebej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/50388703254.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/divajok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/lawiveme.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/ripasosujisobagukovuvesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/xiviz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/sovuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/1094/0328/files/business_quotes.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_off000667c4.bin
a02c3389b2fba9ad5d5866ebe4d95f8465db144be1cb9740b90a5e395a61bcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667C4 5504 bytes
font_01_sfnt_off00067a4a.bin
e0ab831730db0491786ca013768eec189c2f5a5285c5762c77db0cceeea99a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A4A 10324 bytes

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