Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae103e85c5208dd…

MALICIOUS

PDF

42.5 KB Created: 2020-06-27 15:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7e30fcb72bd714a7fc7b7e75441c47 SHA-1: f30f265efba3f88c4b4d0bbc77e5859af9b427d7 SHA-256: 7ae103e85c5208ddb03869e2043b52d5c3084537b4f174780a51df7ac3b9fe31
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, many of which point to disposable domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ttraff.cc/wp3?keyword=election+day+worksheets+for+kids#election+day+worksheets+for+kids', is flagged as malicious. The document also employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common method for credential theft or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/wp3?keyword=election+day+worksheets+for+kids#election+day+worksheets+for+kids
    • http://noahshomehelpservices.com/uploads/1/3/0/7/130776580/mabanevux.pdf
    • http://alphaclean.org/uploads/1/3/1/8/131872058/54d5e4a.pdf
    • http://offdatop.com/uploads/1/3/0/8/130813496/xavegataluzuw.pdf
    • http://a1professionalservices.org/uploads/1/3/0/4/130491319/xuxosokoju-kagekugijagi-bukufutepax.pdf
    • http://centuryway.net/uploads/1/3/0/6/130621979/9343040.pdf
    • http://huellaalojamientocanino.com/uploads/1/3/1/3/131383823/6306454.pdf
    • http://jrpprimeholdings.com/uploads/1/3/1/4/131482962/8d07407d5cb5abb.pdf
    • http://picolombia.com/uploads/1/3/0/6/130622023/88b1293a.pdf
    • http://turnupyourlight.com/uploads/1/3/1/4/131438847/37b4271cbbbd8b6.pdf
    • http://mta-sts.mail.meetthemessenger.com/uploads/1/3/0/9/130969221/2966009.pdf
    • http://hostmaster.remnantswindon.co.uk/uploads/1/3/1/3/131383760/8772387.pdf
    • http://therealitynews254.com/uploads/1/3/0/9/130969027/2927039.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bexanoru.files.wordpress.com/2020/06/wotilomo.pdf
    • https://sifodupaw191158614.files.wordpress.com/2020/06/lepomijapapiwe.pdf
    • https://kowumikov.files.wordpress.com/2020/06/95900464791.pdf
    • https://fuzevibob.files.wordpress.com/2020/06/womova.pdf
    • https://boletibuxo.files.wordpress.com/2020/06/vorotafarifumofafiramijen.pdf
    • https://natebiwogu.files.wordpress.com/2020/06/52692175014.pdf
    • https://wepusezaja.files.wordpress.com/2020/06/xaguxadadugifobazot.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_off000064e3.bin
e5bc048c7f2112adda3ba2499ef4385bb146f5830ccd8d410c716c64a551fab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 5112 bytes
font_01_sfnt_off0000764d.bin
54a94d9f0cb6a9277c9ef04bbaaab4125d6316b0ce03920f243e105363d79af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764D 11380 bytes

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