Malicious PDF — malware analysis report

Static analysis result for SHA-256 02099a96e0714e02…

MALICIOUS

PDF

416.5 KB Created: 2020-08-24 12:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64f91a4429509a4101b87fe4e25e0749 SHA-1: 7a3c6c7aae3ac302dbef62f8d5be6854c8efbcef SHA-256: 02099a96e0714e026aca354e03b87f40f500358a5cea0965ef5f071e6224479f
134 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL leading to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary IOC is the malicious redirector URL, which is likely used to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.ru/pify?keyword=un+fact+finding+mission+myanmar+report
    • http://tadidifep.memorialbusinessday.com/uploads/1/3/2/8/132816202/55842.pdf
    • http://files.simhaco.org/uploads/1/3/2/6/132696285/gosaximoruxe.pdf
    • http://files.euroforestireland.ie/uploads/1/3/2/7/132712139/viregoji-vikeluzavagates.pdf
    • http://xozemik.louisianafigandfruitcakes.com/uploads/1/3/2/6/132682859/9880290.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3227/9190/files/41140608042.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/92594599812.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/guvol.pdf
    • https://cdn.shopify.com/s/files/1/0436/6447/4262/files/tusopow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/byron_katie_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2110/files/vuvutakibetelotejewikopuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/zoderusutukudubiwobav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/astronomy_worksheets_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/japadanukorurijexazijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/nixumaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/ganaxotizigaresovinate.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_off00063979.bin
3c42833d65d24bd5eeae986043c0773dc525fed94a2e8109a951ac47a041ded6
pdf-font-stream PDF embedded font (sfnt) at offset 0x63979 5536 bytes
font_01_sfnt_off00064c36.bin
b95cd75735efef412c9070e6a7e6c0669d07d237e9c98203702bf6a037ce9233
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C36 10968 bytes