Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abce2da08b00792…

MALICIOUS

PDF

163.3 KB Created: 2020-07-09 19:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 78a7b989c080288cd27d2ad3c6d0e9b6 SHA-1: faf9f5e041ef6cd7061c1275267a9836ae24d6ed SHA-256: 4abce2da08b007928b641206612f591c3bed449f21e19a088b18ec48574ca651
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'coffeescript tutorial pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious link. The heuristic for 'SE_ADVANCE_FEE_SCAM_LURE' further supports the malicious intent by indicating the document's content is designed to deceive users into fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=coffeescript%20tutorial%20pdf In PDF document text
    • http://files.poconooldtyme.com/uploads/1/3/2/8/132814473/cbfc312.pdfIn PDF document text
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdfIn PDF document text
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.pdfIn PDF document text
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdfIn PDF document text
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdfIn PDF document text
    • http://files.codeelectricmqt.com/uploads/1/3/1/4/131437948/7edf5f5834f64.pdfIn PDF document text
    • http://files.artisansguildgallery.com/uploads/1/3/2/6/132696285/rorefulo.pdfIn PDF document text
    • http://files.independentscreativegroup.com/uploads/1/3/1/1/131163945/61c59bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tisamipaf.files.wordpress.com/2020/06/nepisobunipip.pdfIn PDF document text
    • https://tijizukoveb.files.wordpress.com/2020/06/puzegalipuketowixinokope.pdfIn PDF document text
    • https://tolotaf347469470.files.wordpress.com/2020/07/lepubade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22505 4948 bytes
SHA-256: 6b30850588a5bdd60c529c7700fff794f5a2074cc8d90a53260296abeca858f2
font_01_sfnt_off000235ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235EF 16928 bytes
SHA-256: cdcb4ada1bcd5b13feca14805ab46bce00d98a07ddf1cb52152ea120d6ec7972
font_02_sfnt_off00026b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B14 16060 bytes
SHA-256: 780c2ba1f46611f184a1210ab6c53f4ed6d1475a687e3cabd97e3deba530dc28

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