Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ed5e5f1fc6c432…

MALICIOUS

PDF

120.9 KB Created: 2020-07-31 01:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82e6db0b8ce3ae4fd13b69c7fa61354 SHA-1: b00529f393cbffaf31fc78da9de8381a77cd6b02 SHA-256: 18ed5e5f1fc6c432b9de0e5fd4273ea7f9815260fa85f12ec46289c488766fcd
194 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 part of an SEO link farm, designed to lure users with seemingly legitimate content. The document body, though heavily obfuscated, contains keywords related to the lure. The primary IOC is a URL that leads to a redirector, likely part of an advance-fee scam.

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.com/pify?keyword=history+of+fortran+programming+language+pdf
    • http://files.ascotdance.co.uk/uploads/1/3/1/8/131871864/ravojomewiwojun.pdf
    • http://files.nhage.org/uploads/1/3/2/3/132303322/04859f66217bb9.pdf
    • http://files.goodfilmhunting.co.uk/uploads/1/3/0/9/130969204/a1ad4017cc00.pdf
    • http://files.faithkingwriter.com/uploads/1/3/2/8/132814071/fisedarusabema_dotuxugubowez_pitixop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/vikowikipowimupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/10483039751.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/48997192262.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/levijigeror.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/44346104550.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/58514576748.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/bodogexisedepezunazaxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/52341720724.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/32712912109.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/2932419031.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/zawosovusuziwiruwunile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.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_off0001981c.bin
087a09bf7818d922cd0f5c40cf650459997e49d68f9b553e8dafd0c329e4f00e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1981C 5304 bytes
font_01_sfnt_off0001aa0f.bin
3dfaec6c866e2f7f9fe350817e4a891162f22f7a2cc2c968d247734f186dcf29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA0F 13440 bytes

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